It is by teaching that we teach ourselves, 

by relating that we observe, 

by affirming that we examine, 

by showing that we look, 

by writing that we think, 

by pumping that we draw water into the well.

Doing easily what others find difficult is talent; 

doing what is impossible for talent is genius.

The fire which enlightens is the same fire which consumes.

Thought is a kind of opium; 

it can intoxicate us, 

while still broad awake; 

it can make transparent the mountains 

and everything that exists.

An error is the more dangerous 

in proportion to
the degree of truth which it contains.

Truth is not only violated by falsehood; 

it may be equally outraged by silence.

Society lives by faith, 

and develops by science.

The man who has no inner-life 

is a slave to his surroundings.

Any landscape is a condition of the spirit.