Critical Thinking Quotes

Most popular critical thinking quotes

It's bad to have an opinion you're proud of if you can't state the arguments for the other side better than your opponents. This is a great mental discipline.


A public-opinion poll is no substitute for thought.

opinions public opinion

Most people would sooner die than think, and often do.

cynical funny

Opinions should be formed with great caution—and changed with greater.



Man's a kind
of Missing Link,
fondly thinking
he can think.


To have doubted one's own first principles is the mark of a civilized man.


The real purpose of books is to trap the mind into doing its own thinking.

books reading

Too often we enjoy the comfort of opinion without the discomfort of thought.


There is nothing like writing to force you to think and get your thoughts straight.


Thinking is the hardest work there is, which is probably the reason so few engage in it.


One must learn to think well before learning to think; afterward it proves too difficult.


Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

reading thinking

It is lacking in critical thinking to think that studying philosophy will improve your critical thinking.


The golden rule is to test everything in the light of reason and experience, no matter from whom it comes.


Half our mistakes in life arise from feeling when we ought to be thinking, and thinking when we ought to be feeling.

feelings human nature

You have to think for yourself. It always amazes me how high IQ people mindlessly imitate. I never get good ideas talking to other people.
To go against the dominant thinking of your friends, of most of the people you see every day, is perhaps the most difficult act of heroism you can perform.


It is bad enough that so many people believe things without any evidence. What is worse is that some people have no conception of evidence and regard facts as just someone else's opinion.


It is astonishing what an effort it seems to be for many people to put their brains definitely and systematically to work. They seem to insist on somebody else doing their thinking for them.