For certain people have crept in unnoticed [just as if they were sneaking in by a side door]. They are ungodly persons whose condemnation was predicted long ago, for they distort the grace of our God into decadence and immoral freedom [viewing it as an opportunity to do whatever they want], and deny and disown our only Master and Lord, Jesus Christ.

But these men sneer at anything which they do not understand; and whatever they do know by [mere] instinct, like unreasoning and irrational beasts—by these things they are destroyed.

These people are [habitual] murmurers, griping and complaining, following after their own desires [controlled by passion]; they speak arrogantly, [pretending admiration and] flattering people to gain an advantage.