My dear soul, flee from the worthless, stay close only to those with a pure heart. Like attracts like. A crow will lead you to the graveyard, a parrot to a lump of sugar.
Rumi
Worthless
Some of what these
Some of what these pamphlets [of astrological forecasts] say will turn out to be true, but most of it time and experience will expose as empty and worthless. The latter part will be forgotten literally: written on the winds while the former will be carefully entered in people’s memories, as is usual with the crowd.
Johannes Kepler
Every man is indeed
Every man is indeed bound to do what he can to promote the good of others, and a man who is of no use to anyone is strictly worthless.
Rene Descartes