These people [claim to] honor me with their lips [i.e., by what they say], but their heart is far from [honoring] me.

And He answered them, "Isaiah prophesied about you hypocrites very well when he wrote [Isa. 29:13], 'These people honor me with their lips [i.e., by what they say], but their heart is far from [honoring] me.

[Psa. 5:9 says], "Their throats are like open graves [i.e., they are foul-mouthed]. They have spoken deceitfully." [Psa. 90:3 says], "There is snake venom under their lips [i.e., their words are deadly]."

It is written in the law [Isa. 28:11f], "I [i.e., God] will speak to these people [i.e., the Israelites] by men with foreign languages and through the lips of strangers, and even then they will not listen to me, says the Lord."

[So], through Jesus then, we should continually offer up to God a sacrifice of praise, that is, the expression of our lips as we confess His name [to be our Lord].