Joy makes us inconsiderate, reckless, and foolhardy, and desire acts almost in the same way.
 Arthur Schopenhauer, The World as Will and Representation (1819). copy citation

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Author Arthur Schopenhauer
Source The World as Will and Representation
Topic desire acts
Date 1819
Language English
Reference
Note Translated by R. B. Haldane and J. Kemp
Weblink http://www.gutenberg.org/files/40097/40097-h/40097-h.html

Context

“Anger makes us no longer know what we do, still less what we say. Zeal, therefore called blind, makes us incapable of weighing the arguments of others, or even of seeking out and setting in order our own. Joy makes us inconsiderate, reckless, and foolhardy, and desire acts almost in the same way. Fear prevents us from seeing and laying hold of the resources that are still present, [pg 430] and often lie close beside us. Therefore for overcoming sudden dangers, and also for fighting with opponents and enemies, the most essential qualifications are coolness and presence of mind.” source