To one man that is to understand which to another is only in some degree to observe; the one is already done and at the goal while the other is only at the beginning; to the one that is the solution which to the other is only the problem.
 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 solution understanding
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

“Lastly, the great individual diversity of intelligence we are speaking about shows itself excellently in the degrees of the clearness of understanding, and accordingly in the distinctness of the whole thinking. To one man that is to understand which to another is only in some degree to observe; the one is already done and at the goal while the other is only at the beginning; to the one that is the solution which to the other is only the problem. This depends on the quality of thought and knowledge, which was already referred to above. As in rooms the degree of light varies, so does it in minds. We can detect this quality of the whole thought as soon as we have read only a few pages of an author.” source