Nothing is real to us but hunger.
- Kakuzo Okokura

The important thing is not to stop questioning.  Curiosity has its own reason for existing.  Once cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structures of reality.  Never lose a holy curiosity.
- Albert Einstein

The human mind can bear plenty of reality, but not too much intermittent gloom.
- Margaret Drabble