William J. Baumol, "Baumol's Sales-Maximization Model: Reply." The American Economic Review 54.6 (1964): 1081-1081: Quoted in: Walid Marrouch, Essays on International Environmental Policy. Diss. 2009.
“Knowing not to have illusions is absolutely necessary in order to have dreams.”
Ibid., p. 276
The Book of Disquiet
Original: Saber não ter ilusões é absolutamente necessário para se poder ter sonhos.
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Fernando Pessoa 288
Portuguese poet, writer, literary critic, translator, publi… 1888–1935Related quotes

“It's necessary to have wished for death in order to know how good it is to live.”
Source: The Count of Monte Cristo

“The best reason for having dreams is that in dreams no reasons are necessary.”

“It isn't necessary to have relatives in Kansas City in order to be unhappy.”

“In order to have the stuff of a tyrant, a certain mental derangement is necessary.”
History and Utopia (1960)

"On Relativism" (1925)
Context: Socialism is good when it comes to wages, but it tells me nothing when it comes to other questions in life that are more private and painful, for which I must seek answers elsewhere. Relativism is not indifference; on the contrary, passionate indifference is necessary in order for you not to hear the voices that oppose your absolute decrees … Relativism is neither a method of fighting, nor a method of creating, for both of these are uncompromising and at times even ruthless; rather, it is a method of cognition. If one must fight or create, it is necessary that this be preceded by the broadest possible knowledge... One of the worst muddles of this age is its confusing of the ideas behind combative and cognitive activity. Cognition is not fighting, but once someone knows a lot, he will have much to fight for, so much that he will be called a relativist because of it.

“You don't know things anywhere! You live in a dream; you manufacture illusions!”
Amanda, Scene Seven
The Glass Menagerie (1944)