But refuse profane and old wives' fables. Exercise yourself toward godliness.
These things Paul instructs Timothy to command and teach (verse 11). In order to do so successfully, he must live such a noble life that none will reject him or his teaching because of his youthfulness. Instead he is to become a model believer in his personal conversation, his conduct, his love for God and man, his faithfulness to God’s will, and his spotless moral purity (verse 12).