“Physical and health adversity is the most difficult type as pain and torment is continuous without an anticipated endpoint; all other types can have an eventual resolution but the ill, endure the mental stress every day.”

Source: Sun and Steel (1968), p. 57.

Je ne conçois guère (mon cerveau serait-il un miroir ensorcelé?) un type de Beauté où il n'y ait du Malheur. Appuyé sur — d'autres diraient: obsédé par — ces idées, on conçoit qu'il me serait difficile de en pas conclure que le plus parfait type de Beauté virile est Satan, — à la manière de Milton.
XVI http://fr.wikisource.org/wiki/Fus%C3%A9es#XVI
Journaux intimes (1864–1867; published 1887), Fusées (1867)

To Robert Dreyfuss in 1964, p. 6403.
Lord Meher (1986)
Context: Tell those who indulge in these drugs (LSD, marijuana, and other types) that it is harmful physically, mentally and spiritually, and that they should stop the taking of these drugs. Your duty is to tell them, regardless of whether they accept what you say, or if they ridicule or humiliate you, to boldly and bravely face these things.

Source: Renegade's Magic

Race: A Study in Modern Superstition (1937)
Context: In seventeenth- and eighteenth-century France, race was already a weapon in the struggle between absolutism, aristocracy, and the middle class. The warfare spread to the arts and philosophy in the nineteenth century, by which time independent shoots in other cultures had also borne fruit, leaving the grand harvesting on a world-wide scale to our generation.
Viewed in the light of such facts, the race question appears a much bigger affair than a trumped-up excuse for local persecution. It becomes rather a mode of thought endemic in Western civilization. It defaces every type of mental activity — history, art, politics, science and social reform.

1983

As quoted in Freedom: A New Analysis (1954) by Maurice William Cranston, p. 112

Variant: Fransisco, what's the most depraved type of human being?

-The man without purpose.
Source: Atlas Shrugged