Who said "Those who serve with honor serve themselves."?

This quote is attributed to Septimius Severus.

Those who serve with honor serve themselves. - Septimius Severus

"Those who serve with honor serve themselves."

Septimius Severus Work

Emperor General Ancient Rome 145–211

"I came, I saw, I conquered."

"Severitas is the mark of a true leader."

"A man's character is his destiny."

"The empire is not conquered by weakness."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."