Reason is like an open secret that can become known to anyone at any time; it is the quiet space into which everyone can enter through his own thought

At the present moment, the security of coherent philosophy, which existed from Parmenides to Hegel, is lost.

To decide to become a philosopher seemed as foolish to me as to decide to become a poet.

Philosophy as practice does not mean its restriction to utility or applicability, that is, to what serves morality or produces serenity of soul.

The Greek word for philosopher (philosophos) connotes a distinction from sophos. It signifies the lover of wisdom (knowledge) as distinguished from him who considers himself wise in the possession of knowledge. This meaning of the word still endures: the essence of philosophy is not the possession of the truth but the search for truth. ... Philosophy means to be on the way. Its questions are more essential than its answers, and every answer becomes a new question.

An ideology is a complex of ideas or notions which represents itself to the thinker as an absolute truth for the interpretation of the world and his situation within it; it leads the thinker to accomplish an act of self-deception for the purpose of justification, obfuscation and evasion in some sense or other to his advantage.

A scientific approach means knowing what one knows and what one doesn't. Absolute or complete knowledge is unscientific.