What is faith? Faith is upholding your end of God’s Covenant. It’s not mouthing the words “I accept Jesus as my personal Lord and Savior!” Faith is accepting it in thought, word, and deed. Remember that not everyone who says “Lord, Lord!” will enter the kingdom of God. There’s a wealth of meaning in that verse.
Faith is trust, confidence, dependence on, resting in, believing and receiving the grace of God that saves us not based on our own righteousness or the deeds we perform but because of His mercy. In Hebrews 11:1, faith is: "Now faith is the substance of things hoped for, the evidence of things not seen." Ephesians 2:8,9 says, "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." Finally, faith is believing God that what He has promised, He WILL do. And genuine faith is revealed by how we live our lives - our walk, our talk, our holiness in Christ. Our works do NOT save us, they show that we are saved AND God alone sees the heart.