As a vessel is known by the sound, whether it be cracked or not; so men are proved, by their speeches, whether thy be wise or foolish

Shall we their fond pageant see?
Lord, what fools these mortals be!

Only a fool is astonished by the foolishness of mankind.

There is tonic in the things that men do not love to hear. Free speech is to a great people what the winds are to oceans ... and where free speech is stopped miasma is bred, and death comes fast.

[Y]ou [man] are fool enough, it seems, to dare to war with [woman=] me, when for your faithful ally you might win me easily.

Dzieje kultury wykazują, ze głupota jest siostrą bliźniaczą rozumu, ona rośnie najbujniej nie na glebie dziewiczej ignorancji , lecz na gruncie uprawnym siódmym potem doktorów i profesorów. Wielkie absurdy nie są wymyślane przez tych, których rozum krząta się wokół spraw codziennych. Nic dziwnego zatem, że właśnie najintensywniejsi myśliciele bywali producentami największego głupstwa. / The history of culture shows that foolishness is a twin sister of wisdom. It does not flourish on the fields of pure ignorance but on the fields tirelessly plowed by doctors and professors. Great absurdities do not flourish where one is busy with everyday life. No wonder that sometimes most vigorous thinkers come up with utmost stupidities. (Dziennik 1956, XIX, Thursday)