"The objective truth is not for me, for I am a subject, and as a subject I must exist."

"To be a human being means to be a spirit."

"The highest good is not to be understood as an abstract, but as a concrete, as a personality."

"Freedom's possibility is not to be able to do this or that, but to be able to do this and that."

"The true humorist does not want to be a humorist, but an earnest man."