Paul gives an example of two false teachers from the time of Moses and applies it to the way people will be. Paul encourages Timothy to follow his own example and stay in God's word.
They have been tested in how well they trust in Christ and obey him, and they have failed the test. AT: "and without sincere faith" or "and they have shown that their faith is not genuine"
Paul uses an expression about physical movement to mean that the false teachers will not have much success among the believers. AT: "they will not have much success" (See: [[rc://en/ta/man/translate/figs-metaphor]])