Dogmatism is the greatest of mental obstacles to human happiness. - Bertrand Russell

A European who goes to New York and Chicago sees the future... when he goes to Asia he sees the past.

no one ever gossips about the virtues of others

A habit of basing convictions upon evidence, and of giving to them only that degree of certainty which the evidence warrants, would, if it became general, cure most of the ills from which the world is suffering. But at present, in most countries, education aims at preventing the growth of such a habit, and men who refuse to profess belief in some system of unfounded dogmas are not considered suitable as teachers of the young.