Arthur Schopenhauer Quote
How very paltry and limited the normal human intellect is, and how little lucidity there is in the human consciousness, may be judged from the fact that, despite the ephemeral brevity of human life, the uncertainty of our existence and the countless enigmas which press upon us from all sides, everyone does not continually and ceaselessly philosophize, but that only the rarest of exceptions do.
Vol. 2, Ch. 3, § 39 - Parerga and Paralipomena (1851) - Counsels and Maxims