Growing Faith: What the Bible Teaches About Strengthening Your Trust in God Day by Day

"Increase our faith" — this was the request the apostles made to Jesus, recorded in Luke 17:5. Men who walked alongside Christ, who had seen miracles and heard His teachings, still recognized that faith needed to be cultivated and strengthened. If they made this request, you are not alone in wondering how to grow in faith every day.

The Bible does not present faith as a feeling that simply appears or disappears. It presents it as an active relationship with God — something that develops, that faces challenges, and that, when practiced, becomes deeper and firmer.

Christian faith is not merely intellectual assent — agreeing that God exists or that Jesus lived is not the same as having faith in the biblical sense. Scripture presents faith as a personal and active relationship with Christ: a trust that involves the whole person and leans on Him.

Paul, in Romans 1:17, uses the phrase "by faith to faith" to describe a continuous movement. Faith does not stop at the first step — it is a dynamic process, a trust that moves forward. The righteous person does not only begin by faith; they live by faith, day after day.

This distinction is crucial: faith is not a spiritual currency we use to buy God's favor, nor is it an effort of will to believe more strongly. Rather, it is first and foremost a gift from God that manifests in the certainty of things hoped for and the trust placed in Him.

One of the Bible's most liberating teachings about faith is that it does not need to be perfect to act — it needs to be practiced.

When the apostles asked Jesus to increase their faith, His answer was surprising: He did not grant them a greater measure of faith as if it were a substance to be poured out. Instead, He redirected the focus to the object of faith and to the power it carries, even when it is small. A faith the size of a mustard seed, Jesus said, would be able to command a sycamine tree — a tree known for its deep and resistant roots — to uproot itself and be planted in the sea (Luke 17:5-6).

The point is not the amount of faith, but the quality of trust placed in God. Faith that acts, even in the face of the impossible, is the faith that grows.

The example of Abraham confirms this principle. Paul highlights that Abraham's faith did not waver in the face of the human impossibility of having a child in old age — it was strengthened as it was practiced. Abraham's faith grew because he continued to trust, continued to act, continued to hope, even when the circumstances seemed to contradict God's promise.

Christian faith is not a solitary effort of will. Scripture teaches that the strengthening of the believer happens through the Holy Spirit.

The biblical expression "strengthened with all power according to His glorious might" points to an action that comes from outside the human being — it is the Spirit who strengthens internally. This means that asking God to strengthen your faith is not weakness; it is exactly what the apostles did, and it is the path Scripture indicates.

Psalm 84:5-7 describes this reality poetically: the deep happiness reserved for those who find their strength not in themselves, but in the Lord. This inner strength establishes the believer and smooths their path, preparing them for the journey of faith — not through human effort, but through complete trust placed in God. The journey of faith, according to the psalmist, is a progression: the believer goes "from strength to strength."

Biblical passages not only describe what faith is — they show how it is lived. From Scripture, it is possible to identify concrete practices that nourish and strengthen trust in God on a daily basis.

Paul, writing to the Philippians, reveals a secret that can only be learned in practice: he had learned to live content in any circumstance — whether in abundance or in need (Philippians 4:11-13). The Greek word used for this contentment, autárkeia, describes a satisfaction that does not depend on external conditions.

This is one of the marks of mature faith: not the absence of difficulties, but the ability to trust in God within them. Paul was not born this way — he learned. And the learning happened throughout a life of practicing faith, proclaiming, waiting and praising.