As in the experimental sciences, truth cannot be distinguished from error as long as firm principles have not been established through the rigorous observation of facts.
If you suppress laboratories, physical science will be stricken with barrenness and death.
Nothing is lost and nothing is created in the operations of art as those of nature.
Chance favors those who are prepared.
My strength lies solely in my tenacity.
Whatever your career may be, do not let yourselves become tainted by a deprecating and barren scepticism.