Bertrand Russell

A hallucination is a fact, not an error; what is erroneous is a judgment based upon it.

Bertrand Russell

A life devoted to science is therefore a happy life, and its happiness is derived from the very best sources that are open to dwellers on this troubled and passionate planet.

Bertrand Russell

A life without adventure is likely to be unsatisfying, but a life in which adventure is allowed to take whatever form it will is sure to be short.

Bertrand Russell

A logical theory may be tested by its capacity for dealing with puzzles, and it is a wholesome plan, in thinking about logic, to stock the mind with as many puzzles as possible, since these serve much the same purpose as is served by experiments in physical science.

Bertrand Russell

A man without a bias cannot write interesting history – if indeed such a man exists.

Bertrand Russell

A man’s acts are partly determined by spontaneous impulse, partly by the conscious and unconscious effects of the various groups to which he belongs.

Bertrand Russell

A marriage is likely to be called happy if neither party ever expected to get much happiness out of it.

Bertrand Russell

A philosopher who uses his professional competence for anything other except a disinterested search for truth is guilty of a kind of treachery.

Bertrand Russell

A proverb is one man’s wit and all men’s wisdom.

Bertrand Russell

A widespread belief is more often likely to be foolish than sensible.

Bertrand Russell