And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.
Jesus said unto him, If thou canst believe, all things are possible to him that believeth.
And Jesus answering saith unto them, Have faith in God.
For with God nothing shall be impossible.
Therefore being justified by faith, we have peace with God through our Lord Jesus Christ:
So then faith cometh by hearing, and hearing by the word of God.
Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked.
If we believe not, yet he abideth faithful: he cannot deny himself.
2 Timothy 2:13
Now the just shall live by faith: but if any man draw back, my soul shall have no pleasure in him.
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.
Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God.
If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him. But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed. For let not that man think that he shall receive any thing of the Lord. A double minded man is unstable in all his ways.
For as the body without the spirit is dead, so faith without works is dead also.
Wherein ye greatly rejoice, though now for a season, if need be, ye are in heaviness through manifold temptations: That the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, might be found unto praise and honour and glory at the appearing of Jesus Christ. Whom having not seen, ye love; in whom, though now ye see him not, yet believing, ye rejoice with joy unspeakable and full of glory: Receiving the end of your faith, even the salvation of your souls.
1 Peter 1:6-9
For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith.
1 John 5:4