2 Timothy 2:2
2 And the things which you have heard from me in the presence of many witnesses, entrust these to faithful men who will be able to teach others also.
2 Timothy 2:15
15 Be diligent to present yourself approved to God as a workman who does not need to be ashamed, accurately handling the word of truth.
2 Timothy 3:16 - 3:17
16 All Scripture is God-breathed and profitable for teaching, for reproof, for correction, for training in righteousness, 17 so that the man of God may be equipped, having been thoroughly equipped for every good work.