A.T. Robertson Commentary 2 Timothy 3:5

"holding a form of godliness, but having denied the power therefore. From these also turn away." — 2 Timothy 3:5 (ASV)

A form of godliness (μορφωσιν ευσεβειας). For μορφωσιν, see Ro 2:20. The outward shape without the reality.

Having denied (ηρνημενο). Perfect middle participle of αρνεομα (see 2:12f.).

Power (δυναμιν). See 1 Corinthians 4:20. See Ro 1:29-31 for similar description.

Turn away (αποτρεπου). Present middle (direct) imperative of αποτρεπω, "turn thyself away from." Old verb, only here in N.T. See IV Macc. 1:33.