Remember your contemporaries who have passed away and were your age. Remember the honors and fame they earned, the high posts they held, and the beautiful bodies they possessed. Today all of them are turned to dust. They have left orphans and widows behind them, their wealth is being wasted, and their houses turned into ruins.
No sign of them is left today, and they lie in dark holes underneath the earth.
Picture their faces before your mind's eye and ponder.