Intelligence is not to make no mistakes, 

but quickly to see how to make them good.

The limits of my language 

means 

the limits of my world.

I hate war 

as only a soldier who has lived it can, 

only as one who has seen 

its brutality, 

its futility, 

its stupidity.

As a single footstep will not make a path on the earth, 

so a single thought will not make a pathway in the mind. 

To make a deep physical path, 

we walk again and again. 

To make a deep mental path, 

we must think over and over 

the kind of thoughts 

we wish to dominate our lives.

Metaphor is embodied in language.

A human being has so many skins inside, 

covering the depths of the heart.

Language is not only the vehicle of thought, 

it is a great and efficient instrument in thinking.

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.

In solitude 

the mind gains strength 

and learns to lean upon itself.

We don't receive wisdom; 

we must discover it for ourselves 

after a journey 

that no one can take for us 

or spare us.

A fool sees not the same tree 

that a wise man sees.

I would rather excel 

in the knowledge 

of what is excellent, 

than in the extent 

of my power and possessions.

It is not in the stars 

to hold our destiny 

but in ourselves.

Do not dwell in the past, 

do not dream of the future, 

concentrate the mind on the present moment.

A child-like man is not a man
whose development has been arrested; 

on the contrary, 

he is a man
who has given himself a chance
of continuing to develop 

long after most adults have muffled themselves 

in the cocoon of middle-aged habit and convention.