So often, evangelical music and preaching gets cluttered by therapeutic models, pragmatism and warm fuzzies to such and extent that the basic Gospel message is either marginalized or completely cast aside. Jesus, rather than saving us from God's wrath and from our own sinfulness, becomes little more than our ticket to success and personal fulfillment.
So I take great refreshment in hymns that turn us back to the true Gospel that, by shedding His blood on the Cross, Jesus ransomed His own from the power of sin. Rock of Ages, in particular, reminds me of His gracious provision for my spiritual bankruptcy. How thankful I am that, because He accepted the penalty for my sin as His own, He hides me under the cloak of His righteousness!