Faith is an inevitable spiritual element for a Christian. It is a gift from God for those who are set apart for himself. The word "faith" is used in this world by many non- Christians, which is not the faith the bible talks about.
Parents' faith in their children's future or employer's faith in his worker's efficiency or pagan's faith in their rituals are completely different from the biblical faith. According to scripture, faith is a gift from the God of the Universe, Who was, and who is, and the IAM.