Common sense is the collection of prejudices acquired by age eighteen.

Curiosity has its own reason for existence.

Great spirits have always encountered opposition from mediocre minds. The mediocre mind is incapable of understanding the man who refuses to bow blindly to conventional prejudices and chooses instead to express his opinions courageously and honestly.

Great spirits have always encountered violent opposition from mediocre minds.

Common sense is that layer of prejudices which we acquire before we are sixteen.

Few people are capable of expressing with equanimity opinions which differ from the prejudices of their social environment. Most people are even incapable of forming such opinions.

Great spirits have always found violent opposition from mediocre minds. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.