The short answer
Coming to faith is a beginning, not a finish line. Scripture pictures it as a birth — "unless one is born again he cannot see the kingdom of God" (John 3:3) — and a birth is precisely the moment when growth starts. Peter tells new believers to crave spiritual milk "that by it you may grow up into salvation" (1 Peter 2:2), which only makes sense if salvation is something you grow up into rather than something finished the instant you believe. The decision to trust Christ is decisive and real; what follows is a lifelong maturing of that faith into love, obedience, and settled character.
The Divine Principle names this after-the-decision reality the growing period: the God-given span in which a person matures from a new beginning toward the fullness God intends for every child. This is not a Unification novelty imposed on the Bible; it is the shape the New Testament already assumes when it speaks of infants and maturity, seeds and fruit, milk and solid food. This post is about what happens in that period — why faith has to grow, what nourishes it, what opposes it, and how a person grows into their own share of responsibility. For the underlying question of whether salvation is a one-time event or an unfolding process, see is salvation an event or a process.
Conversion is a birth, not a finish line
The most common misunderstanding about the Christian life is treating the moment of belief as the destination. It is more accurate to call it a doorway. Jesus described entering the kingdom as being "born again" (John 3:3), and Paul called a believer "a new creation" (2 Corinthians 5:17) — both images of a life just beginning, not one completed. A newborn is fully a person, yet obviously has a whole life of growth ahead. In the same way, a new believer is fully God's child and yet stands at the start of a long road toward maturity. One recent reflection on the wave of young people returning to church put it bluntly: "the real work is just beginning" once someone walks through the door.
Holding the moment and the process together keeps us from two errors. One is treating conversion as everything, so that a person who prayed a prayer years ago assumes no further growth is needed — a mindset the New Testament never encourages. The other is treating conversion as nothing, as if only a slow lifetime of effort matters and the decisive turn to Christ can be dispensed with. Scripture refuses both. There is a genuine passage "from death to life" (John 5:24), and there is a genuine command to "work out your own salvation with fear and trembling" (Philippians 2:12). The door is real; so is the road beyond it. What it means to be truly born from above is unpacked in what born again means.
Why faith has to grow
Faith has to grow because human beings were created to grow. This is one of the clearest and most overlooked truths of Genesis: God placed Adam and Eve in the garden under a commandment — "you shall not eat" (Genesis 2:16-17) — which implies a period of development in which they were to mature before reaching the perfection God intended. They were created good, but not yet complete; growth toward completion was the design, not a flaw to be corrected. The Divine Principle draws this out explicitly as the growing period, and the New Testament assumes the same pattern for every believer who follows.
That is why the biblical writers reach so often for images of development. Paul distinguishes between "milk" for the immature and "solid food" for the mature (1 Corinthians 3:1-2, Hebrews 5:12-14). Jesus' parable of the sower turns entirely on whether the seed of the Word is allowed to take root and grow, or withers because it was never nourished (Matthew 13:20-23). The letter to the Ephesians states the goal directly: that we "grow up in every way into him who is the head, into Christ" (Ephesians 4:15). Belief is the seed; a seed is meant to become a tree. Faith that is never fed does not stay a healthy seed — it dies. Faith that is fed becomes the fruit that proves the seed was alive all along.
What actually nourishes new faith
The means of growth are not mysterious; the earliest church settled on them at once. Of the first believers Luke writes: "they devoted themselves to the apostles' teaching and the fellowship, to the breaking of bread and the prayers" (Acts 2:42). Four things stand out and have carried believers ever since. First, the Word — Scripture read, absorbed, and lived, which feeds the mind and reshapes how a person sees God, themselves, and others. Second, prayer — the living relationship with God that keeps faith from hardening into mere religion. On how to begin, see what prayer is and how we pray.
Third, community — other believers who provide support, correction, belonging, and example. New faith rarely survives in isolation; it was never meant to. Hebrews warns against "neglecting to meet together" precisely because believers need to keep "stirring up one another to love and good works" (Hebrews 10:24-25). Mentorship belongs here too: a more experienced believer walking beside a newer one, as Paul did with Timothy, shortens the road and steadies the walk. Fourth, obedience — actually doing what you have learned. Faith grows into character only when it is practised; love, patience, and honesty become real by being exercised, not merely believed. James is blunt: faith without works "is dead" (James 2:17). Taken together, these are less a checklist than a way of life — the daily, relational, communal work of letting God bring a new life to maturity. This is where faith stops being a label and becomes a relationship, a theme we develop in is faith a relationship or a religion.
The opposition no one warns you about
Many new believers are surprised to find that life gets harder, not easier, after they come to faith — and the surprise itself can shake them. Scripture treats this as normal. In the parable of the sower, Jesus describes seed that springs up quickly but withers "when tribulation or persecution arises on account of the word" (Matthew 13:21). Turning toward God is also a turning away from something, and that reorientation is often met with resistance — sometimes from without, in the form of misunderstanding or pressure, and sometimes from within, in the old habits and desires that do not surrender quietly.
Paul described that inner struggle candidly: "I find it to be a law that when I want to do right, evil lies close at hand" (Romans 7:21). This is not evidence that faith has failed; it is evidence that a real change has begun and is being contested. The old self does not vanish at conversion — it is being put off gradually as the new self is put on (Ephesians 4:22-24). The right response is not alarm but perseverance, drawing on the very means of growth already named. Difficulty, rightly met, is one of the ways faith matures; it presses a believer to depend on God rather than on the ease of their circumstances. Why God allows His people to face such trials at all is taken up in why God allows suffering.
Growing into your own portion of responsibility
Perhaps the most freeing thing about the growing period is that it is genuinely yours to walk. God does not grow a person against their will or in their absence; He provides everything needed — grace, the Word, community, His own presence — and then invites the believer to respond and cooperate. Paul captures the partnership exactly: "work out your own salvation with fear and trembling, for it is God who works in you" (Philippians 2:12-13). God works; we work out. The Divine Principle calls the human side of this a person's portion of responsibility — the small but real part that only you can fulfil, precisely because God honours you as a partner rather than a puppet.
This reframes the whole life of faith after conversion. Growth is not passive waiting for God to zap you into maturity, nor anxious striving to earn what has already been given. It is cooperation: responding daily to grace already offered, choosing obedience, staying in community, returning to prayer when you drift. Over time, these responses accumulate into character, and character into the settled maturity Scripture calls the "full measure" of Christ (Ephesians 4:13). The wonder is that God entrusts something so significant to ordinary faithfulness — that your unremarkable choices to love and obey are the very material out of which a mature child of God is formed. That trajectory belongs to the larger arc of God restoring His whole family, which we trace in God's plan of restoration.
Frequently asked questions
What happens after you become a Christian?
Coming to faith is a beginning, not a completion. The New Testament compares it to being born (John 3:3) and then to an infant who has to grow: "like newborn infants, long for the pure spiritual milk, that by it you may grow up into salvation" (1 Peter 2:2). After the initial decision comes a lifelong process of maturing — learning to love, obey, and trust God through daily life, within a community, until faith becomes character. The Divine Principle calls this the growing period, the God-given time in which a person matures toward the fullness God intends.
Is conversion a single moment or a lifelong process?
Both. There is a real turning point when a person repents and trusts Christ, described as passing "from death to life" (John 5:24). But the New Testament also treats salvation as something worked out over time: "work out your own salvation with fear and trembling" (Philippians 2:12). The moment opens the door; the process walks through it. The Divine Principle has the same shape — a person begins on a foundation of faith and then grows through the growing period toward maturity.
Why does faith have to grow — isn't belief enough?
Because human beings were created to grow. God placed Adam and Eve under a commandment during a period of development (Genesis 2:16-17), showing that maturing toward perfection was the design, not a defect. Belief is the seed, but a seed is meant to become a tree. New faith that is never nourished tends to wither (Matthew 13:20-21), while faith that is fed grows into the fruit that shows the seed was real (Galatians 5:22-23).
What practically helps a new believer grow?
The historic pattern is Scripture, prayer, community, and obedience. The first believers "devoted themselves to the apostles' teaching and the fellowship, to the breaking of bread and the prayers" (Acts 2:42). Reading the Word feeds the mind; prayer keeps the relationship with God alive; community provides support and correction; and doing what you learn turns knowledge into character. Mentorship — a more experienced believer walking alongside a newer one — shortens the road.
Why is life harder for some people after they come to faith?
Because turning toward God is also a turning away from something, and that shift often meets resistance. Jesus warned that when the Word takes root, "tribulation or persecution arises on account of the word" (Matthew 13:21), and Paul described a real inner struggle between the old and new self (Romans 7:21-23). New difficulty usually signals that something genuine has begun, not that faith has failed. The response is perseverance, drawing on the same means of growth — Scripture, prayer, and community — that carry a believer through.