To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement 'I do not know'.
Galileo GalileiE pur si muove. "Albeit It does move". (That's what Galileo purportedly muttered after torturers forced him to recant his theory that the earth orbits the sun.)
Galileo GalileiNothing can be taught to a man, only it's possibly to help him to discover it inside.
Galileo GalileiIf there were as great a scarcity of soil as of jewels or precious metals, there would not be a prince who would not spend a bushel of diamonds and rubies and a cartload of gold just to have enough earth to plant a jasmine in a little pot, or to sow an orange seed and watch it sprout, grow, and produce its handsome leaves, its fragrant flowers, and fine fruit.
Galileo Galilei