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

“It is only men who are free, who create the inventions and intellectual works which to us moderns make life worth while.”

“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.”

“The most important human endeavor is the striving for morality in our actions. Our inner balance and even our very existence depend on it. Only morality in our actions can give beauty and dignity to life.”

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

“Don't dream of being a good person, be a human being is valuable and gives value to life.”

“The only real valuable thing is intuition.”