Trying to determine wh

It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young., Konrad Lorenz, German (Austrianborn) ethologist (1903 1989)
I think, therefore Descartes exists., Saul Steinberg,
Never seem more learned than the people you are with. Wear your learning like a pocket watch and keep it hidden. Do not pull it out to count the hours, but give the time when you are asked., Lord Chesterfield, (1694 1773)
GotLink.pl
Let each man exercise the art he knows., Aristophanes, Wasps, 422 B.C., Greek Athenian comic dramatist (450 BC 388 BC)
Take your work seriously but never take yourself seriously and do not take what happens either to yourself or your work seriously., Booth Tarkington, US novelist (1869 1946)
The positive thinker sees the invisible, feels the intangible, and achieves the impossible., Anonymous,