The distance between insanity and genius is measured only by success.
    -Bruce Feirstein

There is no great genius without some touch of madness.
    - Seneca

There's a fine line between genius and insanity. I have erased this line.
    - Oscar Levant

In the republic of mediocrity, genius is dangerous.
    - Robert G. Ingersoll

Jealousy is the tribute mediocrity pays to genius.
    - Fulton J. Sheen

To mediocrity, genius is unforgivable.
    -Elbert Hubbard

When a true genius appears in the world, you may know him by this sign; that the dunces are all in confederacy against him.
    -Jonathan Swift