Charles Ellicott Commentary Romans 12:9

"Let love be without hypocrisy. Abhor that which is evil; cleave to that which is good." — Romans 12:9 (ASV)

Without dissimulation.—The same Greek word is translated “unfeigned” in 2 Corinthians 6:6; 1 Timothy 1:5; 2 Timothy 1:5, and “without hypocrisy” in James 3:17. This last is the most literal rendering and brings out the resemblance to Matthew 23:13 and others.

Abhor that which is evil.—This clause seems linked to the last through the word “without hypocrisy”: “Let your love arise from genuine and deep emotion; let the basis of your character be an intense hatred of evil and as strong an adhesion to good.” The Apostle does not here enter into the more difficult question as to how those in whom these emotions are naturally weak are to strengthen them. Perhaps no shorter advice is to be given than “become Christians.”

On verses 9-21:

Now follow to the end of the chapter a number of general exhortations, not addressed to particular persons or classes, but to the Church at large.