"If out of all mankind one finds a single friend, he has found something more precious than any treasure, since there is nothing in the world so valuable that it can be compared to a real friend"
"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"
"Non-violence is the greatest force at the disposal of mankind. It is mightier than the mightiest weapon of destruction devised by the ingenuity of man"