Famous quotes containing the words test and/or flights:
“Whenever a true theory appears, it will be its own evidence. Its test is, that it will explain all phenomena.”
—Ralph Waldo Emerson (1803–1882)
“A noble soul is not the one that can manage the highest flights but the one that rises very little and falls very little but always dwells in a free, resplendent atmosphere and altitude.”
—Friedrich Nietzsche (1844–1900)