Charles H. Spurgeon on Psalms 107:1

O give thanks unto the Lord, for he is good. It is all we can give him, and the least we can give; therefore let us diligently render to him our thanksgiving. The psalmist is in earnest in the exhortation, hence the use of the interjection "O", to intensity his words: let us be at all times thoroughly fervent in the praises of the Lord, both with our lips and with our lives, by thanksgiving and thanks living. JEHOVAH, for that is the name here used, is not to be worshipped with groans and cries, but with thanks, for he is good; and these thanks should be heartily rendered, for his is no common goodness: he is good by nature, and essence, and proven to be good in all the acts of his eternity. Compared with him there is none good, no, not one: but he is essentially, perpetually, superlatively, infinitely good. We are the perpetual partakers of his goodness, and therefore ought above all his creatures to magnify his name. Our praise should be increased by the fact that the divine goodness is not a transient thing, but in the attribute of mercy abides for ever the same, for his mercy endureth for ever. The word endureth has been properly supplied by the translators, but yet it somewhat restricts the sense, which will be better seen if we read it, "for his mercy forever." That mercy had no beginning, and shall never know an end. Our sin required that goodness should display itself to us in the form of mercy, and it has done so, and will do so evermore; let us not be slack in praising the goodness which thus adapts itself to our fallen nature.