For only by virtue of imagination can genius ever, according to the requirements of the connection of its painting or poetry or thinking, call up to itself each object or event in a lively image, and thus constantly draw fresh nourishment from the primary source of all knowledge, perception.
 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 perception imagination
Date 1819
Language English
Reference
Note Translated by R. B. Haldane and J. Kemp
Weblink http://www.gutenberg.org/files/40868/40868-h/40868-h.html

Context

“Therefore the imagination is required in order to complete, arrange, give the finishing touches to, retain, and repeat at pleasure all those significant pictures of life, according as the aims of a profoundly penetrating knowledge and of the significant work whereby they are to be communicated may demand. Upon this rests the high value of imagination, which is an indispensable tool of genius. For only by virtue of imagination can genius ever, according to the requirements of the connection of its painting or poetry or thinking, call up to itself each object or event in a lively image, and thus constantly draw fresh nourishment from the primary source of all knowledge, perception. The man who is endowed with imagination is able, as it were, to call up spirits, who at the right time reveal to him the truths which the naked reality of things exhibits only weakly, rarely, and then for the most part at the wrong time.” source