One needn't be a crank to miss the scientific boat. The very paragon of genius, Albert Einstein, couldn't be persuaded to give quantum physics his unreserved endorsement. Here is Einstein's most frequently paraphrased statement of dissatisfaction with the theory: Quantum mechanics is very impressive. But an inner voice tells me that it is not yet the real thing. The theory yields a lot, but it hardly brings us any closer to the secret of the Old One. In any case I am convinced that He doesn't play dice.
The art of leadership . . . consists in consolidating the attention of the people against a single adversary and taking care that nothing will split up that attention. . . . The leader of genius must have the ability to make different opponents appear as if they belong to one category.
These are times in which a genius would wish to live. It is not in the still calm of life, or in the repose of a pacific station, that great challenges are formed. . . . Great necessities call out great virtues.
Abigail Adams (1744 - 1818)
Source: Letter to John Quincy Adams, January 19, 1780
The only difference between a genius and one of common capacity is that the former anticipates and explores what the latter accidentally hits upon; but even the man of genius himself more frequently employs the advantages that chance presents him; it is the lapidary who gives value to the diamond which the peasant has dug up without knowing its value.
Abbe Guillaume Thomas Francois Raynal (1713 - 1796)