3:5

having an appearance of godliness: Paul says that “in the last days,” many would have “an appearance” of godliness, that is, a mere outward form or a semblance of godly devotion. (2Ti 3:1) Some Bible translations render this thought: “They will maintain the outward appearance of religion” or “They will look like they are religious.” Even though people may profess to worship God, their wicked conduct or their excessive love of themselves, money, or pleasures contradicts their claim.​—2Ti 3:2-4.

proving false to its power: True godliness has power to change the personality of people. (Eph 4:22-24; Col 3:10) Those who merely make an outward show of serving God actually deny, or disregard, that power. They do not allow true godly devotion to affect their lives. (Compare Jude 4.) They do not have a genuine Christian faith that is supported by works.​—Jas 2:18-26.

from these turn away: Paul has just foretold how bad the world situation would become “in the last days”; however, he also knows that even in his own day, there are people who to some extent display the traits he has listed. (See study notes on 2Ti 3:1, 2.) Paul here uses a strong verb that may suggest avoiding with horror. He thus emphasizes the need to avoid unnecessary association with those who exhibit the qualities he listed. Of course, Christians would treat even such people gently and with kindness but would not choose them as close friends.​—See study note on 2Ti 2:24.