Titus 2:15

These things speak and exhort and reprove with all authority. Let no man despise thee.

Speak... exhort.., reprove... "These verbs are in the present imperative, meaning `keep on doing it'".[37] They also have the meaning that Paul considered Titus to be already doing the things commanded.

All authority ... "This word, found only in the Pauline epistles, has always the sense of a divine commandment?[38] It is because of the heavenly origin of his message that Titus was admonished to "let no man despise thee." The gospel preacher does not need to feel inferior to any man, because his message is from God.

[37] Ronald A. Ward, op. cit., p. 264.

[38] R. V. G. Tasker, op. cit., p. 202.