2 Timothy 2:5; 2 Timothy 2:18; 2 Timothy 2:21

2 Timothy 2:5

5 Also if anyone competes as an athlete, he does not win the prize unless he competes according to the rules.

2 Timothy 2:18

18 men who have gone astray from the truth saying that the resurrection has already taken place, and they upset the faith of some.

2 Timothy 2:21

21 Therefore, if anyone cleanses himself from these things, he will be a vessel for honor, sanctified, useful to the Master, prepared for every good work.