The bitter and the sweet come from the outside, the hard from within, from one's own efforts.

... the desire for truth must take precedence over all other desires.

Everything has changed except the way man thinks (when the hydrogen bomb was exploded)

Solitude is painful when one is young, but delightful when one is more mature.

A perfection of means, and confusion of aims, seems to be our main problem.

Time is an illusion.

I have made no secret, either privately or publicly, of any sense of outrage over officially enforced military and war service. I regard it as a duty of conscience to fight against such barbarous enslavement of the individual with every means available.