The most formidable weapon against errors of every kind is reason.

I pay no attention whatever 

to anybody's praise or blame. 

I simply follow my own feelings.

I pick my favourite quotations 

and store them in my mind as ready armour, 

offensive or defensive, 

amid the struggle of this turbulent existence.

I find we are growing serious, 

and then we are in great danger of being dull.

Wise men make more opportunities than they find.

Deep into that darkness peering, 

long I stood there, 

wondering, 

fearing, 

doubting, 

dreaming dreams 

no mortal ever dared to dream before.

Every crag 

and gnarled tree 

and lonely valley 

has its own strange and graceful legend 

attached to it.

No endeavour that is worthwhile 

is simple in prospect; 

if it is right, 

it will be simple in retrospect.

Living most of the time 

in a world created mostly in one's head 

does not make for an easy passage in the real world.

After some time, 

with my eyes closed, 

I began to enjoy this wonderful play of colours and forms, 

which it really was a pleasure to observe. 

Then I went to sleep 

and the next day I was fine. 

I felt quite fresh, 

like a newborn.

Education is the key to unlock the golden door of freedom.

I tore myself away from the safe comfort of certainties 

through my love for truth

 — and truth rewarded me.

He who lives in harmony with himself 

lives in harmony with the universe.

There is a single light of science, 

and to brighten it anywhere 

is to brighten it everywhere.

What is the good of your stars and trees, 

your sunrise and the wind, 

if they do not enter into our daily lives?