Titus 2:15

15 These, then, are the things you should teach. Encourage and rebuke with all authority. Do not let anyone despise you.

Read Titus 2:15 Using Other Translations

These things speak, and exhort, and rebuke with all authority. Let no man despise thee.
Declare these things; exhort and rebuke with all authority. Let no one disregard you.
You must teach these things and encourage the believers to do them. You have the authority to correct them when necessary, so don’t let anyone disregard what you say.