“Scientology means scio, knowing in the fullest sense of the word, and logos, study. In itself the word means knowing how to know. Scientology is a 'route,' a way, rather than a dissertation or assertive body of knowledge. Through its drills and studies one may find the truth for himself. The technology is therefore not expounded as something to believe, but something to do.”

Of mathematics — as quoted in Mathematics: The Loss of Certainty (1980) by Morris Kline, p. 99.

The Joy of Children (1966)

The Division of Talent (1985)

Theatrum Chemicum Volume 1 phil. med.

Recreation (1919)
Context: I am not attempting here a full appreciation of Colonel Roosevelt. He will be known for all time as one of the great men of America. I am only giving you this personal recollection as a little contribution to his memory, as one that I can make from personal knowledge and which is now known only to myself. His conversation about birds was made interesting by quotations from poets. He talked also about politics, and in the whole of his conversation about them there was nothing but the motive of public spirit and patriotism. I saw enough of him to know that to be with him was to be stimulated in the best sense of the word for the work of life. Perhaps it is not yet realised how great he was in the matter of knowledge as well as in action. Everybody knows that he was a great man of action in the fullest sense of the word. The Press has always proclaimed that. It is less often that a tribute is paid to him as a man of knowledge as well as a man of action. Two of your greatest experts in natural history told me the other day that Colonel Roosevelt could, in that department of knowledge, hold his own with experts. His knowledge of literature was also very great, and it was knowledge of the best. It is seldom that you find so great a man of action who was also a man of such wide and accurate knowledge. I happened to be impressed by his knowledge of natural history and literature and to have had first-hand evidence of both, but I gather from others that there were other fields of knowledge in which he was also remarkable.

Myron Tribus "You Cannot Lead What You Do Not Understand — You Do Not Understand What You Haven't Done". Journal of Innovative Management, Fall 1996; As quoted in: William J. Altier (1999) The Thinking Manager's Toolbox. p. 9

Interview with William Warren Bartley, cited in — [Bartley, William Warren, w:William Warren Bartley, Werner Erhard: the Transformation of a Man: the Founding of est, Clarkson N. Potter, Inc., 1978, New York, 157, 0-517-53502-5]

Source: Precepts and Judgments (1919), p. 175