Fond memory brings the light of other days around me.

All life is an experiment. 

The more experiments you make 

the better.

Every failure is a step to success.

An unfulfilled vocation drains the colour from a man's entire existence.

Originality is the one thing which unoriginal minds cannot feel the use of.

To love it too much 

is to obscure 

and not see 

what is there.

The information is in the people, 

not in your head.

Once an object has been incorporated in a picture 

it accepts a new destiny.

Truth cannot be brought down; 

rather, the individual must make the effort to ascend to it. 

You cannot bring the mountaintop to the valley. 

If you would attain to the mountaintop, 

you must pass through the valley, 

climb the steeps, 

unafraid of the dangerous precipices.

We do not know enough about 

how the present will lead into the future.

It is that range of biodiversity that we must care for

 — the whole thing — 

rather than just one or two stars.

The only freedom I care about

 is the freedom to do right; 

the freedom to do wrong 

I am ready to part with 

on the cheapest terms 

to anyone who will take it of me.

One change always leaves the way open for the establishment of others.

The enemy is anybody who's going to get you killed, 

no matter which side he's on.

The more nobly a man wills and acts, 

the more avid he becomes 

for great and sublime aims to pursue. 

He will no longer be content with family, country, 

and the remunerative aspect of his work. 

He will want wider organisations to create, 

new paths to blaze, 

causes to uphold, 

truths to discover, 

an ideal to cherish and defend.