Psychology must be a science of functions, not just a science of facts.

The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.

"The past is never dead. It's not even past."

人类思维能够理解宇宙，因为它是宇宙的一部分。