Genius is one percent inspiration and ninety-nine percent perspiration.

Beauty is truth's smile when she holds her own face in a perfect mirror. 

Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.

Love is the only reality and it is not a mere sentiment. It is the ultimate truth that lies at the heart of creation.

He who is to be a good ruler must have first been ruled.

I am just one human being.

A business that makes nothing but money is a poor business. 

Our conscience is like an alarm bell.

The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it.

There will one day spring from the brain of science a machine or force so fearful in its potentialities, so absolutely terrifying, that even man, the fighter, who will dare torture and death in order to inflict torture and death, will be appalled, and so abandon war forever.

Work is undoubtedly worship but laughter is life. Anyone who takes life too seriously must prepare himself for a miserable existence. Anyone who greets joy and sorrows with equal facility can really get the best of life.

No one saves us but ourselves. No one can and no one may. We ourselves must walk the path.