I would do what I pleased, and doing what I pleased, I should have my will, and having my will, I should be contented; and when one is contented, the… - Miguel de Cervantes

Por las cosas que dicen que dije cuando loco, podéis considerar las que diré y haré cuando cuerdo.

"Destiny guides our fortunes more favorably than we could have expected. Look there, Sancho Panza, my friend, and see those thirty or so wild giants, with whom I intend to do battle and kill each and all of them, so with their stolen booty we can begin to enrich ourselves. This is nobel, righteous warfare, for it is wonderfully useful to God to have such an evil race wiped from the face of the earth."
"What giants?" Asked Sancho Panza.
"The ones you can see over there," answered his master, "with the huge arms, some of which are very nearly two leagues long."
"Now look, your grace," said Sancho, "what you see over there aren't giants, but windmills, and what seems to be arms are just their sails, that go around in the wind and turn the millstone."
"Obviously," replied Don Quijote, "you don't know much about adventures."

In short, he became so absorbed in his books that he spent his nights from sunset to sunrise, and his days from dawn to dark, poring over them; and what with little sleep and much reading his brains got so dry that he lost his wits.