What does the Bible mean by Faith?

Faith means belief in the promises of God. For example, Noah believed that God would destroy the world with a flood; he showed his belief (faith) by building the ark. A faithless man is a man who has no confidence in God; he does not believe that God will keep His promises. In his heart, such a man is calling God a liar — one who makes promises and does not keep them.

Faith is an essential part of the Christian life. If we believe that our sins can be washed away through Christ, then we shall show our faith by being baptized. If we believe that God will send the Lord Jesus to cleanse the world and fill it with holiness, then we will show our faith by preparing our hearts for his second coming and praying daily for it. It is impossible to be a Christian without showing faith.