Baruch Spinoza said this quote

“ He who has a true idea simultaneously knows that he has a true idea, and cannot doubt of the truth of the thing perceived. ”

Famous Quotes of Baruch Spinoza

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The highest activity a human being can attain is learning for understanding, because to understand is to be free.

~ Baruch Spinoza

I have made a ceaseless effort not to ridicule, not to bewail, not to scorn human actions, but to understand them.

~ Baruch Spinoza

Minds, however, are conquered not by arms, but by love and nobility.

~ Baruch Spinoza

whatsoever is, is in God, and without God nothing can be, or be conceived

~ Baruch Spinoza