“Only a life lived for others is a life worthwhile.”

“We are all life trying to live, among other life trying to live.”

“The life of the individual has meaning only insofar as it aids in making the life of every living thing nobler and more beautiful. Life is sacred, that is to say, it is the supreme value, to which all other values are subordinate.”

“There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.”

“Life isn't worth living, unless it is lived for someone else.”

“Work is the only thing that gives substance to life.”

“Intelligent life on other planets? I'm not even sure there is on earth!”