Who said "Nothing is so firmly believed as what we least know."?

This quote is attributed to René Descartes.

Nothing is so firmly believed as what we least know. - René Descartes

"Nothing is so firmly believed as what we least know."

René Descartes Truth

Philosopher and Mathematician French 1596–1650

"I think, therefore I am."

"Divide each difficulty into as many parts as is feasible and necessary to resolve it."

"The greatest minds are capable of the greatest vices as well as of the greatest virtues."

"Doubt is the key to knowledge."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."