Look deep into nature, and then you will understand everything better.

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

But their intervention makes our acts to serve ever less merely the immediate claims of our instincts.

Time is what the clock says.

Man can find meaning in life only through devoting himself to society.

We must be prepared to make the same heroic sacrifices for the cause of peace that we make ungrudgingly for the cause of war.

Without "ethical culture", there is no salvation for humanity.