Convictions are more dangerous enemies of truth than lies.
There is no great genius without some touch of madness . Not by wrath does one kill, but by laughter. And I wish no one to believe anything I have written, unless he is personally persuaded by the evidence of reason. Great ideas, it has been said, come into the world as gently as doves. The errors of great men are venerable because they are more fruitful that the truths of little men.