“If anyone is crazy enough to want to kill a president of the United States, he can do it. All he must be prepared to do is give his life for the president's.”

“Beware the barrenness of a busy life.”

“Life is 10 percent what you make it, and 90 percent how you take it.”

“The goal of life is to make your heartbeat match the beat of the universe, to match your nature with Nature.”

“Life is essentially a cheat and its conditions are those of defeat the redeeming things are not happiness and pleasure but the deeper satisfactions that come out of struggle.”

“The wise man does not expose himself needlessly to danger, since there are few things for which he cares sufficiently but he is willing, in great crises, to give even his life - knowing that under certain conditions it is not worthwhile to live.”

“The God who gave us life, gave us liberty at the same time.”

“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.”

“The purpose of art is washing the dust of daily life off our souls.”