Serious-minded people have few ideas. 

People with ideas are never serious.

I shut my eyes and all the world drops dead; 

I lift my eyes and all is born again.

Every child is an artist. 

The problem is how to remain an artist 

once we grow up.

Free imagination is the inestimable prerogative of youth 

and it must be cherished 

and guarded as a treasure.

I have seen great intolerance shown in support of tolerance.

Science is a perception of the world around us. 

Science is a place where what you find in nature pleases you.

Man must shape his tools 

lest they shape him.

The modern conservative is engaged in one of man's oldest exercises in moral philosophy; 

that is, the search for a superior moral justification for selfishness.

It takes courage to grow up and become who you really are.

Falsehood is invariably the child of fear in one form or another.

Sometimes you feel you have the truth of a moment in your hand, 

then it slips through your fingers and is lost.

In fighting nature, 

man can win every battle except the last. 

If he should win that too, 

he will perish, 

like an embryo cutting its own umbilical cord.

Scepticism is the first step on the road to philosophy.

The illiterate of the future will not be the person who cannot read. 

It will be the person who does not know how to learn.

Satisfaction lies in the effort, 

not in the attainment; 

full effort is full victory.