Pleasure is a shadow, wealth is vanity, and power a pageant; but knowledge is ecstatic in enjoyment, perennial in frame, unlimited in space and indefinite in duration.

There has never been a time like this, in which we have the power to create knowledge and the power to create havoc, and both these powers rest in the same hands.

All their sport in the park is but a shadow to that pleasure that I find in Plato; alas good folk, they never felt what true pleasure meant.

Someone will have to weed and spread
The young sprouts. Sprinkle them in the hour
When shadow falls across their bed.
You should try to look at them every day
Because when they come to full flower
I will be away.

If men of knowledge, men of power and men of wealth come together; and there is no difference of opinion among them, then the nation is bound to prosper.

I have accumulated a wealth of knowledge in innumerable spheres and enjoyed it as an always ready instrument for exercising the mind and penetrating further and further. Best of all, mine has been a life of loving and being loved. What a tragedy that all this will disappear with the used-up body!