2 Timothy 1:7

Timothy had apparently held back from some ministry because of timidity. Paul reminded him that such a spirit is not from God. God makes us spiritually powerful (i.e., having a forceful character that uses authority boldly, cf. 1 Corinthians 2:4), loving (Galatians 5:22), and self-disciplined (Galatians 5:23). Self-disciplined refers to a person who has a "wise head." [Note: Fee, p. 227.]

"He [Paul] is obliquely chiding Timothy for his timidity, but softens the blow by lumping himself with him." [Note: J. N. D. Kelly, A Commentary on the Pastoral Epistles, p. 160.]