Calvin comments on Isaiah 53.11:
“…This is the difference between the righteousness of faith and the righteousness of the Law; for, although the Law shews what it is to be righteous, yet Paul affirms that it is impossible that righteousness should be obtained by it, and experience proves the same thing; for the Law is a mirror in which we behold our own unrighteousness….”
“Now, the doctrine which Christ teaches, as to obtaining righteousness, is nothing else than ‘the knowledge of him;’ and this is faith, when we embrace the benefit of his death and fully rely on him” (John Calvin, Commentary on the Prophet Isaiah Vol. III trans. William Pringle [Grand Rapids: Baker Books, 1999], 127).