“Theology without application is like a horse without legs.”
Joel Beeke, Reformed Systematic Theology, Vol. 1, Pg. 155
It is not sinful to know a lot about the Lord. However, if we know a lot about the Lord and we fail to apply what we know about Him in our lives we are no better off than the demons who know a lot about Christ but will not obey Him.
James 2:19- “You believe that God is one; you do well. Even the demons believe—and shudder!”
In our pursuit of learning great truths about our infinite God, we would do well to take the words of Jonathan Edwards to heart, “Practice according to what you have. This will be the way to know more.”
As we read and study our Bibles we should never forget that the key which unlocks the doors of a godly life is not the mere collection of knowledge, but knowledge coupled with application. These two go together like husband and wife and were not designed to be divorced from one another.
If we desire to be more like Christ we must grow in the grace and knowledge of our Lord and Savior Jesus Christ (2 Peter 3:18). In that great pursuit, we must also make sure we are watching our lives as well (1 Timothy 4:16).