Have Observed, yet failed to pay Attention! During Transmigration downwards the Yāma deva asks one this: Did you never see in this world a man or a woman, eighty, ninety, or a 100 years old, frail, crooked as a gable-roof, bent down, resting on crutches, with tottering steps, shaking, far from young, with broken teeth, grey & scanty hair or bald, wrinkled, with black blotched limbs? Did that sight never make you think, that you also will become old, & cannot escape it? Did you never see in this world a man or a woman who, being sick, ailing, and grievously ill, fumbling in own filth & excrement, lifted up by some and put to bed by others? And did that sight never make you think that you also inevitably will become sick, & that you cannot ever escape it? Did you never see in this world the corpse of a man or a woman, 1, 2 or three days dead, swollen up, pale bluish-black, smelling & half-rotten? Did that repulsive sight never make you realize, that you indeed also inevitably will meet death, disintegrate and that you cannot escape it? Source: (edited excerpt) AN 3:35