No positive quality possessed by a false idea is removed by the presence of what is true, in virtue of its being true.
 Baruch Spinoza, Ethics (1677). copy citation

add
Author Baruch Spinoza
Source Ethics
Topic virtue quality
Date 1677
Language English
Reference
Note Translated by R. H. M. Elwes
Weblink http://www.gutenberg.org/files/3800/3800-h/3800-h.htm

Context

“There is no individual thing in nature, than which there is not another more powerful and strong. Whatsoever thing be given, there is something stronger whereby it can be destroyed. PROPOSITIONS. PROP. I. No positive quality possessed by a false idea is removed by the presence of what is true, in virtue of its being true. Proof.—Falsity consists solely in the privation of knowledge which inadequate ideas involve (II. xxxv.) , nor have they any positive quality on account of which they are called false (II. xxxiii.)” source