“Considered as a whole, Hesse's achievement can hardly be matched in modern literature; it is the continually rising trajectory of an idea, the fundamentally religious idea of how to 'live more abundantly'.”

in A Glance Back at Five Decades of Scientific Research, published in Particles and Fields: Classical and Quantum, Journal of Physics: Conference Series 87 (2007), IOP Publishing, p. 9.

Blue Like Jazz (2003, Nelson Books)

Source: Computing Machinery and Intelligence (1950), p. 454.
Context: Another simile would be an atomic pile of less than critical size: an injected idea is to correspond to a neutron entering the pile from without. Each such neutron will cause a certain disturbance which eventually dies away. If, however, the size of the pile is sufficiently increased, the disturbance caused by such an incoming neutron will very likely go on and on increasing until the whole pile is destroyed. Is there a corresponding phenomenon for minds, and is there one for machines? There does seem to be one for the human mind. The majority of them seem to be "sub-critical," i. e., to correspond in this analogy to piles of sub-critical size. An idea presented to such a mind will on average give rise to less than one idea in reply. A smallish proportion are super-critical. An idea presented to such a mind may give rise to a whole "theory" consisting of secondary, tertiary and more remote ideas. Animals minds seem to be very definitely sub-critical. Adhering to this analogy we ask, "Can a machine be made to be super-critical?"

The Law of Mind (1892)

Source: Conversations with Saul Bellow

From a letter now regarded as a forgery by Johann Friedrich Rochlitz http://www.aproposmozart.com/Stafford%20--%20Mozart%20and%20genius.rev.ref.pdf, http://www.mozartforum.com/Lore/article.php?id=108, http://www.mozartforum.com/Lore/article.php?id=106
Misattributed
Context: When I am, as it were, completely myself, entirely alone, and of good cheer — say traveling in a carriage, or walking after a good meal, or during the night when I cannot sleep — it is on such occasions that my ideas flow best, and most abundantly. Whence and how they come, I know not, nor can I force them.

Environmentalism as a Religion (2003)
Context: Most of us have had some experience interacting with religious fundamentalists, and we understand that one of the problems with fundamentalists is that they have no perspective on themselves. They never recognize that their way of thinking is just one of many other possible ways of thinking, which may be equally useful or good. On the contrary, they believe their way is the right way, everyone else is wrong; they are in the business of salvation, and they want to help you to see things the right way. They want to help you be saved. They are totally rigid and totally uninterested in opposing points of view. In our modern complex world, fundamentalism is dangerous because of its rigidity and its imperviousness to other ideas.

Remarks Recorded for the Opening of a USIA Transmitter at Greenville, North Carolina (8 February 1963) Audio at JFK Library (01:29 - 01:40) http://www.jfklibrary.org/Asset-Viewer/Archives/JFKWHA-161-010.aspx · Text of speech at The American Presidency Project http://www.presidency.ucsb.edu/ws/?pid=9551
1963
Variant: A man may die, nations may rise and fall, but an idea lives on. Ideas have endurance without death.

Vol. I : The Dedication (March 1772)
Institutes of Natural and Revealed Religion (1772–1774)
Context: The mind of man can never be wholly barren. Through our whole lives we are subject to successive impressions; for, either new ideas are continually flowing in, or traces of the old ones are marked deeper. If, therefore, you be not acquiring good principles be assured that you are acquiring bad ones; if you be not forming virtuous habits you are, how insensibly soever to yourselves, forming vicious ones…