While the easiest way in metaphysics is to condemn all metaphysics as nonsense, the easiest way in morals is to elevate the common practice of the community into a moral absolute.

I've been meaning to read Kant's Groundwork of the Metaphysics of Morals.

He studies metaphysics.

Sami went to a metaphysical store.

Mathematics has not a foot to stand upon which is not purely metaphysical.

He's studying metaphysics.

I was thrown out of college for cheating on the metaphysics exam; I looked into the soul of the boy sitting next to me.

Mathematics is the only good metaphysics.

The exact meaning of metaphysics is controversial.

Religion is the metaphysics of the common people.