Now faith is the assurance of things hoped for, the conviction of things not seen. For by it the people of old received their commendation. By faith we understand that the universe was created by the word of God, so that what is seen was not made out of things that are visible.
— Hebrews 11:1-3 ESV

Read chapter 11 here

The writer of Hebrews believes that true faith is not a vague hope or a blind trust based on wishful thinking, but it is a confidence that God will fulfill his promises, without being able to see any evidence. In the rest of the chapter (I encourage you to read the whole thing!), the author lists numerous Old Testament examples where people were commended for their faith: Abel, Abraham, Noah, Sarah, Moses and more. God made a promise to each of these people, and they all trusted that He would follow through, even when it didn't seem possible.

Faith is one of the most important parts of our relationship with God, so it is incredibly important that we know what it is. We know that we are saved through faith, and we know that faith can lead us through difficult trials, but if we don't know what faith is, how can we have faith? Faith is the confidence that God is good, wise, loving, and that He will follow through.

So how do we have faith? Thanks to His written word, we can know what God promises to us, but how can we be confident that He will follow through? As the man who cried out the Jesus, "Help my unbelief!" (Mark 9:24), we must ask God for faith. We must ask that God the Spirit will give us faith and give us confidence in His word, and this is the kind of faith that will save us.
"But we are not of those who shrink back and are destroyed, but of those who have faith and preserve their souls." - Hebrews 10:39

pray

Father,
You are good. Thank you for everything You are. I ask that you would give us the confidence to trust you with everything. I ask that you would give us the grace to know that you'll follow through, no matter how difficult it may be. God, would you reveal yourself more and more so that we could have full assurance that the things you have promised will come to pass. We love you, God! Amen.

- Hunter MacInnis