Faith is not in faith, but faith is in Jesus. Read this powerful quote by Horatius Bonar (1808–1889).
“The God connects salvation with believing, trusting, knowing, remembering. Yet the salvation is not in our act of believing, trusting, knowing, or remembering; it is in the thing or person believed on, trusted, known, remembered. Nor is salvation given as a reward for believing and knowing. The things believed and known are our salvation. Nor are we saved or comforted by thinking about our act of believing and ascertaining that it possesses all the proper ingredients and qualities which would induce God to approve of it, and of us because of it. This would be making faith a meritorious, or, at least, a qualifying work; and then grace would be no more grace. It would really be making our faith a part of Christ’s work, — the finishing stroke put to the great understanding of the Son of God, which, otherwise, would have been incomplete, or, at least, unsuitable for the sinner, as a sinner. To the man that makes his faith and his trust his rest, and tries to pacify his conscience by getting up evidence of their solidity and excellence, we say, miserable comforters are they all! I get light by using my eyes; not by thinking about my use of them, nor by a scientific analysis of their component parts. So I get peace by, and in believing; not by thinking about my faith, or trying to prove to myself how well I have performed the believing act. We might as well extract water from the desert sands as peace from our own act of faith. Believing in the Lord Jesus Christ will do everything for us; believing in our own faith, or trusting in our own trust, will do nothing.”
(from God’s Way of Peace by Horatius Bonar)