Doubt Quote by Robert Frost

We must be skeptical even of our skepticism.

— Bertrand Russell

Skepticism is forever whispering in your ears. You're very new at this. You may be mistaken. You've been wrong before.

— D. J. Grothe

Skepticism literally means a thoughtful inquiry, the looking at a problem in a disinterested spirit, the surveying of a question from many sides. In…

— Joseph Alexander Leighton

Skepticism means, not intellectual doubt alone, but moral doubt.

— Thomas Carlyle

Skepticism is the beginning of faith.

— Oscar Wilde

Skepticism is the chastity of the intellect.

— George Santayana

There is no skepticism without science and the scientific method. It's about how we know what we know.

— Steven Novella

Skepticism is like a microscope whose magnification is constantly increased: the sharp image that one begins with finally dissolves, because it is not possible…

— Stanislaw Lem

Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense.

— Carl Sagan

Skepticism is a virtue in history as well as in philosophy.

— Napoleon Bonaparte

Skepticism does not preserve us from foolhardy deeds.

— Mason Cooley

“We invite skepticism. In fact, we require it. It is an essential mechanism for challenging ideas, identifying errors, and furthering collective knowledge.”

— Bret Weinstein & Heather Heying