Psalm 51:15

He said to the man, 'Friend, how did you get in here without wearing the proper wedding outfit?' And he could not say a word.

Now we [all] know that everything the law says applies to those who are under [obligation to obey] that law, [Note: Here "the law" appears to refer to the Old Testament Scriptures generally, since Psalms and Isaiah are quoted. See verses 10-18]. This is so that the mouth of every objector may be stopped [i.e., from making excuses for his sin], and thereby bring the entire world under God's judgment [i.e., both Jews and Gentiles].

and, looking up to heaven, He sighed and said, "Ephphatha," which means, "Be opened."

[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].