What is Faith?

Here is the Biblical definition of faith: Hebrews 11:1. If we consider the entire biblical context, from Abel to John the Apostle, we cannot separate faith from the Will of God. In Hebrews 11 we see examples of faith, like Abel. Just by reading Genesis 4, we may think that Abel just did what was convenient, because he was a shepherd he offered a lamb, it doesn't look like Abel act by faith at all, but in Hebrews we see that the sacrifice he made, he did by faith, because from the beginning God was announcing that The Perfect Lamb, Jesus Christ, one day would be sacrificed for our sins, and because of that, Abel's sacrifice was accepted. What about Abraham? We see from the beginning of his walk with God, that his faith was conformed to the Will of God. Genesis 12:1. Because he obeyed, he saw God's faithfulness. Along the way, God tested his faith, and his faith increased to the point that he was called Father of Faith. How much faith John the Baptist needed to fulfill such a tough calling? What about Jesus' disciples? There are many wonderful examples of men and women of faith in the Bible that should be enough to lead us to believe in the Word of God.
Conclusion: Real Faith is always according to the Will of God, and if faith doesn't lead to works, it is dead, James 2:26.