We are all geniuses up to the age of ten.

We are all geniuses up to the age of ten.

Genius is one per cent inspiration and ninety-nine per cent perspiration.

Genius is one per cent inspiration and ninety-nine per cent perspiration.

There is no great genius without some touch of madness.

There is no great genius without some touch of madness.

I have nothing to declare but my genius.

I have nothing to declare but my genius.

Common sense is instinct. Enough of it is genius.

Common sense is instinct. Enough of it is genius.

What the world needs is more geniuses with humility, there are so few of us left.

What the world needs is more geniuses with humility, there are so few of us left.

The difference between genius and stupidity is that genius has its limits.

The difference between genius and stupidity is that genius has its limits.

No great genius has ever existed without some touch of madness.

No great genius has ever existed without some touch of madness.

What is called genius is the abundance of life and health.

What is called genius is the abundance of life and health.