Human beings do not live in the objective world alone, 

nor alone in the world of social activity 

as ordinarily understood, 

but are very much at the mercy of 

the particular language which has become the medium of expression for their society.

Genius is nothing but continued attention.

But words are things, and a small drop of ink, 

Falling like dew, upon a thought, produces 

That which makes thousands, perhaps millions, think.

Truth is the daughter of time, 

not of authority.

Dissent is the native activity of the scientist, 

and it has got him into a good deal of trouble in the last years. 

But if that is cut off, 

what is left will not be a scientist. 

And I doubt whether it will be a man.

The tyranny of a prince 

in an oligarchy 

is not so dangerous to the public welfare 

as the apathy of a citizen 

in a democracy.

Life's tragedy is that we get old too soon and wise too late.

Success is not the key to happiness. 

Happiness is the key to success. 

A learned fool is more a fool than an ignorant fool.

Whatever we put our attention on will grow stronger in our life.

A single lie destroys a whole reputation of integrity.

Perplexity is the beginning of knowledge.

Not all those who wander are lost.

Writing, to me, is simply thinking through my fingers.

The second principle of magic: 

things which have once been in contact with each other 

continue to act on each other at a distance 

after the physical contact has been severed.