"In order to weep, I had descended to the realm of the dead themselves, to their secret chambers, led by the invisible but soft hands of birds down stairways which were folded up again as I advanced. I displayed my grief in the friendly fields of death, far from men: within myself."

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From whence it happens, that they which trust to books, do as they that cast up many little sums into a greater, without considering whether those little sums were rightly cast up or not; and at last finding the error visible, and not mistrusting their first grounds, know not which way to clear themselves; but spend time in fluttering over their books, as birds that entering by the chimney, and finding themselves enclosed in a chamber, flutter at the false light of a glass window, for want of wit to consider which way they came in.

— Thomas Hobbes