that's the beauty of

This is the most satisfactory feature of, as in And our vacations fall at the same time; that's the beauty of working in different law practices. [Mid-1700s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.