Take heed to these verses, preachers, and be sure that you are practicing what you are preaching. Jesus only preached that which He practiced.
Pay close attention to yourself and to your teaching; persevere in these things, for as you do this you will ensure salvation both for yourself and for those who hear you. – 1 Timothy 4:16
you, therefore, who teach another, do you not teach yourself? You who preach that one shall not steal, do you steal?
– Romans 2:21
For Ezra had set his heart to study the law of the LORD and to practice it, and to teach His statutes and ordinances in Israel.
– Ezra 7:10
He who teaches before he practices short-circuits the three-step process that Ezra demonstrated.