The human understanding is unquiet; it cannot stop or rest, and still presses onward, but in vain. Therefore it is that we cannot conceive of any end… - Francis Bacon

This misplacing hath caused a deficience, or at least a great improficience in the sciences themselves. For the handling of final causes, mixed with the rest in physical inquiries, hath intercepted the severe and diligent inquiry of all real and physical causes, and given men the occasion to stay upon these satisfactory and specious causes, to the great arrest and prejudice of further discovery. For this I find done not only by Plato, who ever anchoreth upon that shore, but by Aristotle, Galen, and others which do usually likewise fall upon these flats of discoursing causes.

It is the peculiar and perpetual error of the human understanding to be more moved and excited by affirmatives than by negatives.

Alonso of Aragon was wont to say in commendation of age, that age appears to be best in four things — old wood best to burn, old wine to drink, old friends to trust, and old authors to read.