The science hangs like a gathering fog in a valley, a fog which begins nowhere and goes nowhere, an incidental, unmeaning inconvenience to passers-by.

Biologically the species is the accumulation of the experiments of all its successful individuals since the beginning.

Patriotism has become a mere national self assertion, a sentimentality of flag-cheering with no constructive duties.

I must confess that my imagination refuses to see any sort of submarine doing anything but suffocating its crew and floundering at sea.

After people have repeated a phrase a great number of times, they begin to realize it has meaning and may even be true.

There is no upper limit to what individuals are capable of doing with their minds. There is no age limit that bars them from beginning. There is no obstacle that cannot be overcome if they persist and believe.

Hunger makes a fool of a man.