What is faith, exactly?

Now faith is assurance of things hoped for, proof of things not seen.Now faith is the substance of things hoped for, the evidence of things not seen.

Without faith it is impossible to be well pleasing to him, for he who comes to God must believe that he exists, and that he is a rewarder of those who seek him.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.

for we walk by faith, not by sight.(For we walk by faith, not by sight:)

So faith comes by hearing, and hearing by the word of God.So then faith cometh by hearing, and hearing by the word of God.

that if you will confess with your mouth that Jesus is Lord, and believe in your heart that God raised him from the dead, you will be saved. For with the heart, one believes unto righteousness; and with the mouth confession is made unto salvation.That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

but these are written, that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in his name.But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.

They said therefore to him, “What must we do, that we may work the works of God?” Jesus answered them, “This is the work of God, that you believe in him whom he has sent.”Then said they unto him, What shall we do, that we might work the works of God? Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.

for by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, that no one would boast.For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast.

Now to him who works, the reward is not counted as grace, but as something owed. But to him who doesn’t work, but believes in him who justifies the ungodly, his faith is accounted for righteousness.Now to him that worketh is the reward not reckoned of grace, but of debt. But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.

Yet, looking to the promise of God, he didn’t waver through unbelief, but grew strong through faith, giving glory to God, and being fully assured that what he had promised, he was also able to perform.He staggered not at the promise of God through unbelief; but was strong in faith, giving glory to God; And being fully persuaded that, what he had promised, he was able also to perform.

For this cause I also suffer these things. Yet I am not ashamed, for I know him whom I have believed, and I am persuaded that he is able to guard that which I have committed to him against that day.For the which cause I also suffer these things: nevertheless I am not ashamed: for I know whom I have believed, and am persuaded that he is able to keep that which I have committed unto him against that day.

By faith, Abraham, when he was called, obeyed to go out to the place which he was to receive for an inheritance. He went out, not knowing where he went.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.

I have been crucified with Christ, and it is no longer I that live, but Christ living in me. That life which I now live in the flesh, I live by faith in the Son of God, who loved me, and gave himself up for me.I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me.

Even so faith, if it has no works, is dead in itself.Even so faith, if it hath not works, is dead, being alone.

For in Christ Jesus neither circumcision amounts to anything, nor uncircumcision, but faith working through love.For in Jesus Christ neither circumcision availeth any thing, nor uncircumcision; but faith which worketh by love.