The advancement of mathematics is due to those who are driven not by the desire for application but by the joy of discovery.

Joy sparks the urge to play, interest sparks the urge to explore, contentment sparks the urge to savor and integrate, and love sparks a recurring cycle of each of these urges within safe, close relationships.

神经症是无法忍受模糊性。

释义：内心纷杂不净，难以领悟真理；意志不坚定，难以成就功业。