Matthew 23:3

Verse 3. All therefore whatsoever, etc, That is, all that they teach consistent with the law of Moses; all the commands of Moses which they read to you and properly explain. The word all could not be taken without such a restriction, for Christ himself accuses them of teaching many things contrary to that law, and of making it void by traditions, Mt 15:1-6. They say, and do not. The interpretation they give to the law is in the main correct, but their lives do not correspond with their teaching. It is not the duty of men to imitate their teachers unless their lives are pure; but they are rather to obey the law of God than to frame their lives by the example of evil men.