Nothing darkens the eyes of the mind so much, and deadens the conscience so surely, as an allowed sin. It may be a little one, but it is not the less dangerous for all that. A small leak will sink a great ship, and a small spark will kindle a great fire, and a little allowed sin in like manner will ruin an immortal soul. Take my advice, and never spare a little sin.
Thoughts For Young Men
Via: J.C. Ryle Quotes