no man should be angry at what is true.
But those who love the truth in each thing are to be called lovers of wisdom and not lovers of opinion.
 Plato, The Republic. copy citation

add
Author Plato
Source The Republic
Topic wisdom truth
Date
Language English
Reference
Note Translated by Benjamin Jowett
Weblink http://www.gutenberg.org/files/1497/1497-h/1497-h.htm

Context

“Shall we then be guilty of any impropriety in calling them lovers of opinion rather than lovers of wisdom, and will they be very angry with us for thus describing them? I shall tell them not to be angry; no man should be angry at what is true. But those who love the truth in each thing are to be called lovers of wisdom and not lovers of opinion. Assuredly. BOOK VI. And thus, Glaucon, after the argument has gone a weary way, the true and the false philosophers have at length appeared in view. I do not think, he said, that the way could have been shortened.” source