From the additional notes to Charles Spurgeon's The Treasury of David: psalm 112
Verse 1. In his commandments. When we cheerfully practice all that the Lord requireth of us, love sweetens all things, and it becomes our meat and drink to do his will. The thing commanded is excellent, but it is sweeter because commanded by him—"his commandments." A man is never thoroughly converted till he delighteth in God and his service, and his heart is overpowered by the sweetness of divine love. A slavish kind of religiousness, when we had rather not do than do our work, is no fruit of grace, and cannot evidence a sincere love.—Thomas Manton.