From a letter written to a young George Muller, containing very timely advice.
Only seek by watching and prayer more and more to be delivered from all vanity and self-complacency, by which even the true believer may be ensnared when he least expects it. Let it be your chief aim to be more and more humble, faithful, and quiet. May we not belong to those who say and write continually,’ Lord,’ ‘Lord,’ but who have Him not deeply in their hearts. Christianity consists not in words, but in power. There must be life in us. For, therefore, God loved us first that we might love Him in return; and that loving we might receive power, to be faithful to Him, and to conquer ourselves
Emphasis mine.
