You may know a good deal about Christ, by a kind of head knowledge. You may know who He was, and where He was born, and what He did. You may know His miracles, His sayings, His prophecies, and His ordinances. You may know how He lived, and how He suffered, and how He died. But unless you know the power of Christ’s cross by experience — unless you know and feel within that the blood shed on that cross has washed away your own particular sins, unless you are willing to confess that your salvation depends entirely on the work that Christ did upon the cross — unless this be the case, Christ will profit you nothing. The mere knowing Christ’s name will never save you. You must know His cross, and His blood, or else you will die in your sins.
~ J. C. Ryle
from, Practical Religion, Banner of Truth, (19980, pp. 248-9.