If a man calls himself a philosopher and never had his life attempted, rest assured there is nothing in him, and against [John] Locke's philosophy, i… - Thomas de Quincey

There was no friend of Kant's but considered the day on which he was to dine with him as a day of pleasure. Without giving himself the air of an instructor, Kant really was so in the very highest degree. The whole entertainment was seasoned with the overflow of his enlightened mind, poured out naturally and unaffectedly upon every topic, as the chances of conversation suggested it; and the time flew rapidly away, from one o'clock to four, five, or even later, profitably and delightfully. Kant tolerated no calms, which was the name he gave to the momentary pauses in conversation, or periods when its animation languished.

For the last year and a half this room had been my 'pensive citadel:' here I had read and studied through all the hours of the night: and, though true it was, that for the latter part of this time I, who was framed for love and gentle affections, had lost my gaiety and happiness, during the strife and fever of contention with my guardian; yet, on the other hand, as a boy, so passionately fond of books, and dedicated to intellectual pursuits, I could not fail to have enjoyed many happy hours in the midst of general dejection. I wept as I looked round on the chair, hearth, writing-table, and other familiar objects, knowing too certainly, that I looked upon them for the last time.

For it may be observed, generally, that wherever two thoughts stand related to each other by a law of antagonism, and exist, as it were, by mutual repulsion, they are apt to suggest each other.