Romans 12:9

The former exhortations respect church officers in particular; those that follow concern all Christians in general. He begins with love, because that is a radical grace; other graces, and gracious actions, do spring from it, and must be accompanied with it. By love here, you may understand the love of God, or of our neighbour: the latter seems chiefly to be intended. The great requisite in love is this, that it be without dissimulation, or (as the word is) without hypocrisy; i.e. that it be sincere and unfeigned, 2 Corinthians 6:6 1 Peter 1:22. It must not be in word and in tongue only, but in deed and in truth, 1 John 3:18. Abhor that which is evil; do not only avoid it, but hate it, and that as hell itself. The simple verb imports extreme detestation, and it is aggravated by the composition: see Psalms 119:104 Amos 5:15. Cleave to that which is good; be glued to it; so the word signifieth. Things that are glued together are hardly disjoined. The same word is used of the union and conjunction between man and wife: see Matthew 19:5 Ephesians 5:31.