“Sorrow is knowledge: they who know the most
Must mourn the deepest o’er the fatal truth,
The Tree of Knowledge is not that of Life.”
Act I, scene i.
Manfred (1817)
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George Gordon Byron 227
English poet and a leading figure in the Romantic movement 1788–1824Related quotes

“Since knowledge is but sorrow's spy,
It is not safe to know.”
The Just Italian (licensed Oct. 2, 1629; printed 1630), Act v. Sc. 1.
Compare: "From ignorance our comfort flows", Matthew Prior, To the Hon. Charles Montague; "Where ignorance is bliss, ’T is folly to be wise", Thomas Gray, Eton College, Stanza 10.

“Learn to eat of the tree of Knowledge, and of the tree of Life enjoy the fruit.”
IV. Defense and Support : Building blocks for the O.T.O. Temple
Parsifal and the Secret of the Graal Unveiled (1914)
Context: Closing Word
Learn to eat of the tree of Knowledge, and of the tree of Life enjoy the fruit. Seek both within yourself, and so you recognize them and know their place, you are come to the highest rung of the 12 step ladder.
Through this will the Divine-Love be awoken that does not have a place in the twisted minds of men, but dwells in his heart, from which the salvational current will be born which gives us the vision of the eternal light and annihilates all falsity.
"The eternal-feminine draws us up?!"

[Raman, C. V., Chandralekha, Why the Sky is Blue: Dr. C.V. Raman Talks about Science, http://books.google.com/books?id=LOC3vbnTgHYC&pg=PT1, 2010, Tulika Books, 978-81-8146-846-8, 17]

The Heaven of Animals (l. 29–34).
The Whole Motion; Collected Poems, 1945-1992 (1992)
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 364.

“A little knowledge is a dangerous thing. I regret that this isn't fatal.”
Re: unibyte http://groups.google.com/group/gnu.emacs.help/msg/d767a45084444a5a (Usenet article).
Usenet articles, Miscellaneous
“Western Civ,” p. 18.
Giants and Dwarfs (1990)