What Is Faith? The Bible's Definition
The substance of things hoped for — faith in Scripture is trust with an object, not optimism with a blindfold.
The Bible defines it once, directly: “Now faith is the substance of things hoped for, the evidence of things not seen” (Hebrews 11:1). Biblical faith is personal trust in God — taking him at his word and leaning on it — which “cometh by hearing, and hearing by the word of God” (Romans 10:17), and “without faith it is impossible to please him” (Hebrews 11:6).
Trust with an object
Faith’s power is entirely in what it grips. Scripture never praises faith in faith — a strong belief in thin ice still drowns; weak faith in thick ice still crosses. Hebrews 11’s heroes are remembered not for the intensity of their conviction but for the reliability of the God they trusted: Abraham judged “him faithful who had promised.” Biblical faith is a hand, and its strength is the arm it holds.
Now faith is the substance of things hoped for, the evidence of things not seen.
But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
Faith acts
In Hebrews 11 every entry has a verb: by faith Noah built, Abraham went, Moses refused, Rahab hid. James presses the point to its edge — faith without works is dead — not because works earn anything, but because real trust moves feet. Believing the chair holds is completed by sitting down. Faith, in Scripture, is visible in its footprints.
Even so faith, if it hath not works, is dead, being alone.
By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing whither he went.
Where faith comes from
Faith is not self-generated optimism; it comes by hearing the word of God — trust grows from exposure to the trustworthy. Jesus honoured mustard-seed faith and answered the honest cry “help thou mine unbelief.” And Scripture calls Jesus himself “the author and finisher of our faith” — its origin, sustainer, and destination all at once.
So then faith cometh by hearing, and hearing by the word of God.
And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.
Quick answers
- Is faith believing without evidence?
- No — biblical faith rests on testimony and track record: eyewitnesses (2 Peter 1:16; 1 Corinthians 15:3–8), fulfilled promises, and God’s character. Hebrews calls it “evidence of things not seen” — trust in what is unseen, grounded in a God who has shown himself.
- How can I grow my faith?
- By its food: “faith cometh by hearing… the word of God” (Romans 10:17), exercised in obedience, tested in trials (James 1:3), and prayed for directly — “Lord, Increase our faith” (Luke 17:5) was the apostles’ own request.
- What's the difference between faith and works?
- Faith receives salvation; works express it. Paul (Ephesians 2:8–9) and James (2:17) describe the same coin’s two faces: saved by faith alone, but by a faith that is never alone.
