Truth that has been merely learned is like an artificial limb, a false tooth, a waxen nose; at best, like a nose made out of another’s flesh; it adheres to us only because it is put on. But truth acquired by thinking of our own is like a natural limb; it alone really belongs to us. This is the fundamental difference between the thinker and the mere man of learning.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "Truth that has been merely learned is like an artificial limb, a false tooth, a waxen nose; at best, like a nose made out of another’s flesh; it adheres to us only because it is put on. But truth acquired by thinking of our own is like a natural limb; it alone really belongs to us. This is the fundamental difference between the thinker and the mere man of learning." in the context of "Arthur Schopenhauer, “On Thinking for Oneself,” Parerga und Paralipomena, Vol. 2, § 260" to mean that wisdom is timeless.