If conquerors be regarded as the engine-drivers of History, then the conquerors of thought are perhaps the pointsmen who, less conspicuous to the traveler's eye, determine the direction of the journey.

Chemically induced hallucinations, delusions and raptures may be frightening or wonderfully gratifying; in either case they are in the nature of confidence tricks played on one's own nervous system.

There is only one prospect worse than being chained to an intolerable existence: The nightmare of a botched attempt to end it.

Some of the greatest discoveries...consist mainly in the clearing away of psychological roadblocks which obstruct the approach to reality; which is why,post factum they appear so obvious.

...the temptation, which consisted of a single word written on the cemetary of the defeated: Sleep.

God is dethroned; and although the incognizant masses are tardy in realizing the event, they feel the icy draught caused by that vacancy. Man enters upon a spiritual ice age; the established churches can no longer provide more than Eskimo huts where their shivering flock huddles together.

Hitherto man had to live with the idea of death as an individual; from now onward mankind will have to live with the idea of its death as a species.