The science of the mind can only have for its proper goal the understanding of human nature by every human being, and through its use, brings peace to every human soul.

We may be seeing a coming together of the humanities and the science of human nature.

Speech is human nature itself, with none of the artificiality of written language

Religion is the reaction of human nature to its search for God

Any voter with a healthy understanding of the flaws of human nature and who notices the vast amounts of money solicited and received by politicians cannot help but believe that we are unduly influenced by our benefactors' generosity,

We need more understanding of human nature, because the only real danger that exists is man himself . . . We know nothing of man, far too little. His psyche should be studied because we are the origin of all coming evil.