Authors:

Know then this truth, enough for man to know virtue alone is happiness below.

Alexander Pope, William Roscoe (1824). “The Works of Alexander Pope: Esq. with Notes and Illustrations by Himself and Others, to which are Added, a New Life of the Author, an Estimate of His Poetical Character and Writings, and Occasional Remarks”
Know then this truth, enough for man to know virtue alone is happiness below.