J. C. Ryle on Indwelling Sin

In my reading this morning I came across this great paragraph on sin written by J. C. Ryle, the 19th century English pastor.

...I am convinced that the greatest proof of the extent and power of sin is the pertinacity with which it cleaves to man even after he is converted and has become the subject of the Holy Ghost's operation. To use the language of the Ninth Article, 'this infection of nature doth remain - yea, even in them that are regenerate.' So deeply planted are the roots of human corruption, that even after we are born again, renewed, 'washed, sanctified, justified,' and made living members of Christ, these roots remain alive in the bottom of our hearts, and, like the leprosy in the walls of the house, we never get rid of them until the earthly house of this tabernacle is dissolved. Sin, no doubt, in the believer's heart, has no longer dominion. It is checked, controlled, mortified, and crucified by the expulsive power of the new principle of grace. The life of a believer is a life of victory and not of failure. But the very struggles which go on within his bosom, the fight that he finds it needful to fight daily, the watchful jealousy which he is obliged to exercise over his inner man, the contest between the flesh and the spirit, the inward 'groanings' which no one knows but he who has experienced them - all, all testify to the same great truth, all show the enormous power and vitality of sin. Mighty indeed must that foe be who even when crucified is still alive! Happy is that believer who understands it, and while he rejoices in Christ Jesus has no confidence in the flesh; and while he says, 'Thanks be unto God who giveth us the victory,' never forgets to watch and pray lest he fall into temptation!

Ryle, Holiness, pg. 6

The Key to Spiritual Growth

So often we talk of "growing in Christ." We talk of our desire to "grow in Christ." We confess certain struggles or areas that we need to "grow in Christ." Yet so often that growth never happens, the transformation we long for never comes. Why is that? Author, RC Sproul offers his thoughts:

The key method Paul underscored as the means to the transformed life is by the 'renewal of the mind.' This means nothing more and nothing less than education. Serious education. In-depth education. Disciplined education in the things of God. It calls for a mastery of the Word of God. We need to be people whose lives have changed because our minds have changed...To be conformed to Jesus, we must first begin to think as Jesus did. We need the 'mind of Christ.' We need to value the things He values and despise the things He despises. We need to have the same priorities He has. We need to consider weighty the things that He considers weighty. That cannot happen without a mastery of His Word. The key to spiritual growth is in-depth Christian education that requires a serious level of sacrifice. (The Holiness of God, 164)

Consider that last line: "The key to spiritual growth is in-depth Christian education that requires a serious level of sacrifice." My question is, what will you sacrifice for your spiritual growth?