Perhaps the only way to understand it is:

2 Timothy 3: 1-17 goes along with this warning.
3 You can be certain that in the last days there will be some very hard times. 2 People will love only themselves and money. They will be proud, stuck-up, rude, and disobedient to their parents. They will also be ungrateful, godless, 3 heartless, and hateful. Their words will be cruel, and they will have no self-control or pity. These people will hate everything good. 4 They will be sneaky, reckless, and puffed up with pride. Instead of loving God, they will love pleasure. 5 Even though they will make a show of being religious, their religion won't be real. Don't have anything to do with such people.