"And the apostles said unto the Lord, Increase our faith." — Luke 17:5 (KJV)
The short answer
Faith is confident trust in God and His promises — the settled assurance of things hoped for and unseen. The Bible teaches that faith comes by hearing God's word, pleases Him, and shows itself in action, anchored in Hebrews 11:1 and Hebrews 11:6.
Faith is the hinge on which the Christian life turns. It is not blind optimism or wishful thinking, but confident trust in a God who has proven Himself faithful. Faith is how we receive God's salvation, how we walk with Him day by day, and how we hold on when circumstances give us nothing visible to grip. Scripture never treats faith as a private feeling we work up; it points us to the object of faith — God Himself — and shows how such trust takes root and bears fruit. Below are eight passages, quoted exactly from the King James Version, grouped around the questions faith naturally raises.
What is faith?
Scripture does not leave faith undefined. It describes a confident assurance about what we hope for and a settled certainty about what we cannot yet see.
"Now faith is the substance of things hoped for, the evidence of things not seen." — Hebrews 11:1 (KJV)
Faith is not a leap into the dark but confident assurance. It gives substance to what we hope for and evidence of what we cannot yet see. Faith treats God's promises as solid ground.
"For we walk by faith, not by sight:" — 2 Corinthians 5:7 (KJV)
The Christian life is lived by faith rather than by sight. We trust what God has said even when circumstances offer no visible proof. Sight will come; for now, faith walks ahead.
Where does faith come from?
If faith is confident trust in God, we naturally ask how it begins. Scripture answers that faith is awakened by God's word and given as part of His grace.
"So then faith cometh by hearing, and hearing by the word of God." — Romans 10:17 (KJV)
Faith is not manufactured by effort; it is awakened by God's word. As the word is heard, faith is born. This is why Scripture is so central — it is the soil where trust grows.
"For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:" — Ephesians 2:8 (KJV)
Even the faith by which we are saved is a gift, not a private accomplishment. Grace saves us through faith, and both come from God. We bring the empty hand; He supplies the rest.
Why does faith matter to God?
Faith is not an optional extra in the life of a believer. Scripture says it is essential to pleasing God and central to the whole life of the righteous.
"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." — Hebrews 11:6 (KJV)
Faith is not decoration; it is essential to pleasing God. To come to Him we must believe both that He is and that He rewards those who seek Him. Trust is the door through which relationship begins.
"For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith." — Romans 1:17 (KJV)
The gospel reveals a righteousness received from faith to faith. From beginning to end the just live by faith, not by their own record. It is a life of continual trust in God's provision.
What does living faith look like?
Genuine faith is never merely spoken; it is lived. Jesus calls us to trust God without wavering, and James reminds us that real faith always bears fruit.
"And Jesus answering saith unto them, Have faith in God. For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith. Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them." — Mark 11:22-24 (KJV)
Jesus calls His followers to genuine faith in God, a trust that prays without wavering. This is not a formula for demanding whatever we please, but confidence in a Father who hears — faith directed toward Him and aligned with His will.
"Even so faith, if it hath not works, is dead, being alone." — James 2:17 (KJV)
Living faith is never idle. Real trust produces real fruit, and a faith that never acts is dead. Works do not earn salvation; they are the evidence that faith is truly alive.
Frequently asked questions
What is faith according to the Bible?
Hebrews 11:1 gives the classic definition: now faith is the substance of things hoped for, the evidence of things not seen (KJV). Faith is confident trust in God and His promises, treating what He has said as solid even when it cannot yet be seen. It is not a leap into the dark but assurance grounded in the character of God, and Romans 10:17 says it comes by hearing the word of God.
Can faith exist without works?
James 2:17 says even so faith, if it hath not works, is dead, being alone (KJV). Living faith naturally produces action, so a faith that never shows itself in how we live is not real, living faith at all. This does not mean works earn salvation. Ephesians 2:8-9 is clear that we are saved by grace through faith, not by works. Rather, good works are the fruit of genuine faith, the evidence that it is truly alive.
"I have fought a good fight, I have finished my course, I have kept the faith:" — 2 Timothy 4:7 (KJV)
Take it deeper
These verses are a beginning, not the whole of what God says about faith. FlickerFaith is a Scripture-first study companion — open it to read these passages in full context, search related verses, pray for faith to grow, and ask honest questions about trusting God. It keeps you close to the Word, not away from it.
Keep reading
Faith is how we receive God's grace and enter salvation, and it turns from sin in repentance. To put your faith in Christ, see how to be saved. To understand the tool itself, read what is Christian AI? and explore AI Bible study, or return home.