Romans 2:17-21 King James Version (KJV)
17 Behold, thou art called a Jew, and restest in the law, and makest thy boast of God,
18 And knowest his will, and approvest the things that are more excellent, being instructed out of the law;
19 And art confident that thou thyself art a guide of the blind, a light of them which are in darkness,
20 An instructor of the foolish, a teacher of babes, which hast the form of knowledge and of the truth in the law.
21 Thou therefore which teachest another, teachest thou not thyself? thou that preachest a man should not steal, dost thou steal?