As long as our brain is a mystery, the universe, the reflection of the structure of the brain will also be a mystery.

Every man if he so desires becomes sculptor of his own brain.

It is idle to dispute with old men. Their opinions, like their cranial sutures, are ossified.

Unfortunately, nature seems unaware of our intellectual need for convenience and unity, and very often takes delight in complication and diversity.

Intellectual beauty is sufficient unto itself, and only for it rather than for the future good of humanity does the scholar condemn himself to arduous and painful labors.

The brain is a world consisting of a number of unexplored continents and great stretches of unknown territory.

In summary, all great work is the fruit of patience and perseverance, combined with tenacious concentration on a subject over a period of months or years.