Romans 16:19

No harm has been done as yet. Still it is well to be upon your guard.

Simple concerning evil. — This is not at all the same word as that which is translated “simple” above. The first is that freedom from dishonest motives which makes a man an unsuspecting and easy prey for designing persons, and applies rather to natural bent and disposition. The second refers rather to the confirmed habit of one who has come in contact with evil, and is still uncontaminated by it; who has resisted all the plots and schemes that have been laid for him; and whose love for what is good and hatred of evil, has only been strengthened and disciplined. The word for “simple” here means “unmixed,” “uncontaminated,” “pure and clear.”