But know that the LORD has set apart him that is godly for himself: the LORD will hear when I call unto him.
All Commentaries on Psalms 4:3 Go To Psalms 4
Augustine of Hippo
AD 430
4. "And know ye that the Lord hath magnified his Holy One" (ver. 3). Whom but Him, whom He raised up from below, and placed in heaven at His right hand? Therefore doth he chide mankind, that they would turn at length from the love of this world to Him. But if the addition of the conjunction (for he says, "and know ye") is to any a difficulty, he may easily observe in Scripture that this manner of speech is usual in that language, in which the Prophets spoke. For you often find this beginning, "And" the Lord said unto him, "And" the word of the Lord came to him. Which joining by a conjunction, when no sentence has gone before, to which the following one may be annexed, peradventure admirably conveys to us, that the utterance of the truth in words is connected with that vision which goes on in the heart. Although in this place it may be said, that the former sentence, "Why do ye love vanity, and seek a lie?" is as if it were written, Do not love vanity, and seek a lie. And being thus read, it follows in the most direct construction, "and know ye that the Lord hath magnified His Holy One." But the interposition of the Diapsalma forbids our joining this sentence with the preceding one. For whether this be a Hebrew word, as some would have it, which means, so be it; or a Greek word, which marks a pause in the psalmody (so as that Psalma should be what is sung in psalmody, but Diapsalma an interval of silence in the psalmody; that as the coupling of voices in singing is called Sympsalma, so their separation Diapsalma, where a certain pause of interrupted continuity is marked): whether I say it be the former, or the latter, or something else, this at least is probable, that the sense cannot rightly be continued and joined, where the Diapsalma intervenes.
5. "The Lord will hear me, when I cry unto Him." I believe that we are here warned, that with great earnestness of heart, that is, with an inward and incorporeal cry, we should implore help of God. For as we must give thanks for enlightenment in this life, so must we pray for rest after this life. Wherefore in the person, either of the faithful preacher of the Gospel, or of our Lord Himself, it may be taken, as if it were written, the Lord will hear you, when you cry unto Him.