Ecclesiastes 12:1-3

Remember [thoughtfully] also your Creator in the days of your youth [for you are not your own, but His], before the evil days come or the years draw near when you will say [of physical pleasures], “I have no enjoyment and delight in them”; [2 Sam 19:35] before the sun and the light, and the moon and the stars are darkened [by impaired vision], and the clouds [of depression] return after the rain [of tears]; in the day when the keepers of the house (hands, arms) tremble, and the strong men (feet, knees) bow themselves, and the grinders (molar teeth) cease because they are few, and those (eyes) who look through the windows grow dim