Charles H. Spurgeon on Psalms 125:4

Upright in their hearts. All true excellence has its seat here. It is not the good action which makes the good man: it is the good man who does the good action. The merit of an action depends entirely upon the motives which have prompted its performance; and, tried by this simple test, how many deeds, which have wrung from the world its admiration and its glory, might well be described in old words, as nothing better than splendid sins. When the heart is wrong, all is wrong. When the heart is right, all is right. —N. M'Michael.