Charles H. Spurgeon on Psalms 32:3

My bones waxed old. God sports not at the sins of his elect, but outwardly doth deal with them more hardly, and chastise them more rigorously than he doth the reprobate. David's troubles and pains were partly external, partly internal: external I call those that were cast on his body; internal upon his conscience. And in the body were torments and vexations, seizing sometimes on his flesh —which was less painful —sometimes on his bones, which was more grievous, yea, almost intolerable, as experience teacheth. And this is God's just recompense; when we bestow our strength on sin, God abates it, and so weakens us. Samson spent his strength on Delilah, but to what weakness was he brought! Let us, therefore, learn, that God hath given us bones and the strength thereof for another use, that is, to serve him, and not waste or be prodigal of them in the devil's service. Archibald Symson.