John Trapp on Psalms 71:9

Verſ. 9. Caſt me not off in the time of old age] For now I have moſt need of thee. The white Roſe is ſooneſt cankered, ſo is the white Head ſooneſt corrupted.

Saepe nigrum cor eſt, capue albium —

Satan maketh a prey of old Salomon, Aſa, Lot, others; whom when young, hee could never ſo deceive. The Heathens therefore well warn us to look well to our old age, as that which cometh not alone, but is infeſted with many diſeaſes both of body and minde. This David knew, and therefore prayed, as here, Caſt me not off in the time of old age, for ſake me not when my ſtrength faileth. He is a rare old man that can ſay with Caleb, Joſh. 14.10, 11. Omnia fert at[illegible: 2 letters], animum quo que .