1 Peter 2:6-12
The foundation of the believer’s faith is Christ Jesus Himself. The believer receives doctrine because Christ has taught it, but still it is not a doctrine that is the foundation of his confidence. It is a person: “The one who believes in him.” The Lord Jesus Himself, as the Son of God, is the object of our faith: it is upon Him that we lean. The apostle does not say in 2 Timothy, “I know what I have believed,” though that would be true, but “I know in whom I have believed, and I am confident that he is able to guard what I have entrusted until that day” (2 Tim 1:12). The faith that saves the soul is confidence in a person, reliance upon one who will certainly effect the salvation of those who trust Him.
Rest in the Lord and wait patiently for Him, for your expectation is from Him. There is plenty for you to do for your Lord, to show your love to Him and to glorify His name. But you cannot add to the foundation of your confidence, nor should you dream of doing so. How could you improve what your Lord declares to be finished? Is not His work all-sufficient? Do you want to move the foundation? Does it not stand fast forever? Lean on it steadily and let this be your chief concern.