Charles H. Spurgeon on Psalms 31:10

For my life is spent with grief, and my years with sighing. It had become his daily occupation to mourn; he spent all his days in the dungeon of distress. The sap and essence of his existence was being consumed, as a candle is wasted while it burns. His adversities were shortening his days, and digging for him an early grave. Grief is a sad market to spend all our wealth of life in, but a far more profitable trade may be driven there than in Vanity Fair; it is better to go to the house of mourning than the house of feasting. Black is good wear. The salt of tears is a healthy medicine. Better spend our years in sighing than in sinning. The two members of the sentence before us convey the same idea; but there are no idle words in Scripture, the reduplication is the fitting expression of fervency and importunity. My strength faileth because of mine iniquity. David sees to the bottom of his sorrow, and detects sin lurking there. It is profitable trouble which leads us to trouble ourselves about our iniquity. Was this the psalmist's foulest crime which now gnawed at his heart, and devoured his strength? Very probably it was so. Sinful morsels, though sweet in the mouth, turn out to be poison in the bowels: if we wantonly give a portion of our strength to sin, it will by and by take the remainder from us. We lose both physical, mental, moral, and spiritual vigour by iniquity. And my bones are consumed. Weakness penetrated the innermost parts of his system, the firmest parts of his frame felt the general decrepitude. A man is in a piteous plight when he comes to this.