Hebrews 13:14-15
“For we have here no continuing city” (he says) “but we seek one to come. By Him therefore let us offer the sacrifice of praise to God continually, that is, the fruit of our lips giving thanks to His Name.”
“By Him,” as by an High Priest, according to the flesh. “Giving thanks” (he says) “to His Name.” (See p. 514.) Let us utter nothing blasphemous, nothing hasty, nothing bold, nothing presumptuous, nothing desperate. This is “with reverence and godly fear.” For a soul in tribulations becomes desponding, and reckless. But let not us [be so]. See here he again says the same thing which he said before, “not forsaking the assembling of ourselves together,” for so shall we be able to do all things with reverence. For oftentimes even out of respect for men, we refrain from doing many evil things.
Source: Homilies on the Epistle to the Hebrews (New Advent)