When one is frightened of the truth then it is never the whole truth that one has an inkling of.

Russell's books should be bound in two colours, those dealing with mathematical logic in red - and all students of philosophy should read them; those dealing with ethics and politics in blue - and no one should be allowed to read them.

Philosophy is not a theory but an activity.

It is one of the chief skills of the philosopher not to occupy himself with questions which do not concern him.

Philosophy aims at the logical clarification of thoughts. Philosophy is not a body of doctrine but an activity. A philosophical work consists essentially of elucidations.

Philosophy may in no way interfere with the actual use of language; it can in the end only describe it.

The object of philosophy is the logical clarification of thought.

Philosophy limits the thinkable and therefore the unthinkable.