人类
Man is so naturally good that when he does evil it is against his will.
The only thing that will redeem mankind is cooperation.
Three passions， simple but overwhelmingly strong， have governed my life: the longing for love， the search for knowledge， and unbearable pity for the suffering of mankind.
It is a first principle of human action that a man does what he believes will satisfy his desires.
Knowledge is the highest wealth of humanity, and sharing knowledge is the greatest generosity.