Doubt Quote by Bertrand Russell

Rationalism doesn't require "belief," only observation. The real, measurable world doesn't care what you believe.

— Joe Haldeman

“It may be laid down broadly that irrationalism, i.e. disbelief in objective fact, arises almost always from the desire to assert something for which…

— Bertrand Russell

“a rationalist isn't ever certain of anything”

— Eliezer Yudkowsky

“What we call rational grounds for our beliefs are often extremely irrational attempts to justify our instincts.”

— Thomas Henry Huxley

In our reasonings concerning matter of fact, there are all imaginable degrees of assurance, from the highest certainty to the lowest species of moral…

— David Hume

Rationality is the recognition of the fact that nothing can alter the truth and nothing can take precedence over that act of perceiving it.

— Ayn Rand

“The mind of the most rational among us may be compared to a stormy ocean of passionate convictions based on desire, upon which float…

— Bertrand Russell

“if people begin by thinking rationally, the danger is that they may end by acting rationally also.”

— Grant Allen

“The fact that an opinion has been widely held is no evidence whatever that it is not entirely absurd; indeed in view of the…

— A.J. Aaron

“We humans like to think we are creatures of reason. We aren't. The reality is that we make our decisions first and rationalize them…

— Scott Adams

Rationalism is an adventure in the clarification of thought.

— Alfred North Whitehead

“probability is principally a branch of applied skepticism,”

— Nassim Nicholas Taleb