Who said "A boundary well-drawn is a mercy to both sides of it."?

This quote is attributed to Hadrian.

A boundary well-drawn is a mercy to both sides of it. - Hadrian

"A boundary well-drawn is a mercy to both sides of it."

Hadrian Justice

Emperor Ancient Rome 76–138

"Nothing is harder to bear than a good example."

"I have always strived to be the best, but I have also learned that the best is not always perfection."

"A man who fears nothing is more dangerous than a man who fears something."

"The greatest luxury is knowledge."

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."