Charles H. Spurgeon on Psalms 37:4

We have in the former part extended the meaning of the words Delight thyself in the Lord, beyond what they seem at first sight literally to signify; so as not to understand them merely as requiring that very single act of delight to be immediately and directly terminated on God himself; but to take them as comprehending all the sum of all holy and religious converse with God, i.e., as it is delightful, or as it is seasoned (intermingled, and as it were besprinkled) with delight; and upon the same account, of all out other converse, so far as it is influenced by religion. And I doubt not, to such as shall attentively have considered what hath been said, it will be thought very reasonable to take them in that latitude; whereof the very letter of the text (as may be alleged for further justification hereof) is most fitly capable. For the particle which we read in the Lord, hath not that signification alone, but signifies also with, or by, or besides, or before, or in presence of, as if it had been said, "Come and sit down with God, retire thyself to him, and solace thyself in the delights which are to be found in his presence and converse, in walking with him, and transacting thy course as before him, and in his sight." As a man may be said to delight himself with a friend that puts himself under his roof, and, besides personal converse with himself, freely enjoys the pleasure of all the entertainments, accommodations, and provisions which he is freely willing to communicate with him, and hath the satisfaction which a sober person would take in observing the rules and order of a well governed house. John Howe.