Grace causes the Christian to act, reason the philosopher. Other men are carried away by their passions, their actions not being preceded by reflection: these are the men who walk in darkness. On the other hand, the philosopher, even in his passions, acts only after reflection; he walks in the dark, but by a torch.
Denis Diderot in the article on Philosophy, Vol. 25, p. 667, in L'Encyclopédie (1751 - 1766).
The action of freedom, through which the form turns into the form of the form as its content and returns into itself, is called "reflection."
Johann Gottlieb Fichte, Complete Works, volume 1, p. 67, as translated in Walter Benjamin: Selected Writings: Volume 1, 1913-1926 (1996), p. 122.
Education begins the gentleman, but reading, good company, and reflection must finish him.
John Locke, as quoted in The Book-Lover's Enchiridion (1884) by Alexander Ireland, p. 94.
Music is reflection of self, we just explain it, and then we get our checks in the mail.
The solitary side of our nature demands leisure for reflection upon subjects on which the dash and whirl of daily business, so long as its clouds rise thick about us, forbid the intellect to fasten itself.