The finest opportunity ever given to the world was thrown away because the passion of equality made vain the hope for freedom.
The passion for power over others can never cease to threaten mankind, and is always sure of finding new and unforseen allies in continuing its martyrology.
Fanaticism in religion is the alliance of the passions she condemns with the dogmas she professes.
It is they [men of science] who hold the secret of the mysterious property of the mind by which error ministers to truth, and truth slowly but irrevocably prevails. Theirs is the logic of discovery, the demonstration of the advance of knowledge and the development of ideas, which as the earthly wants and passions of men remain almost unchanged, are the charter of progress, and the vital spark in history.