Romans 12:9
Love must be sincere. Detest what is evil; cling to what is good.
What it says
Love is to be unfeigned, and the love that is real recoils from evil and stays fastened to good.
What it is doing
This verse sets the tone for the whole section: real love has moral edges.
In context
9Love must be sincere. Detest what is evil; cling to what is good. 10Be devoted to one another in brotherly love. Outdo yourselves in honoring one another. 11Do not let your zeal subside; keep your spiritual fervor, serving the Lord. 12Be joyful in hope, patient in affliction, persistent in prayer. 13Share with the saints who are in need. Practice hospitality.