C.N. Douglas, comp. Forty Thousand Quotations: Prose and Poetical. 1917.

Zoroaster

Ability in a man is knowledge which emanates from divine light.

All flows out from the Deity, and all must be absorbed in Him again.

Devotion, like fire, goeth upward.

Error is frail.

Excessive liberty and excessive servitude are equally dangerous, and produce nearly the same effect.

Things divine are not attainable by mortals who understand sensual things.

When you doubt, abstain.