Charles H. Spurgeon on Psalms 89:15

People that know the joyful sound. Here it is supposed that we have intelligence in respect of "the joyful sound." For there is knowledge not merely of the utterances and intonations, but of the sense and substance, of the thought aud feeling, which they convey. And I suppose this to be the meaning of Christ when he says, "My sheep hear my voice, and they follow me; and a stranger will they not follow, for they know not the voice of strangers." And I have often been surprised, to note the accuracy with which persons otherwise not very intelligent, not largely informed, not of critical acumen, will yet, when they hear a discourse, judge, discriminate, determine; will be able to say at once —"Truth, clear, unmixed, without a cloud upon it; "or —"Doctrine clouded, statements confused, not the lucid Gospel:" or be able to say, if it be so —"No Gospel at all; contradiction to the truth of Christ." They "Know the joyful sound", as it rolls from the plenitude of God's own voice and bosom in his august and blessed revelations; as it is confirmed, authenticated and sealed by the precious blood of our Lord and Saviour Jesus Christ; as it is witnessed to by the eternal Spirit: "the joyful sound", that there is salvation for lost and ruined men by faith in the blood and in the obedience of him who died upon the tree, and is now enthroned in the highest place in heaven. —James Stratten, 1845.