Who said "To lead is to serve those who believe in your vision."?

This quote is attributed to Constantine I.

To lead is to serve those who believe in your vision. - Constantine I

"To lead is to serve those who believe in your vision."

Constantine I Leadership

Emperor Ancient Rome 272–337

"In this sign, conquer."

"The greatest glory of a building is its fitness to the purpose for which it is built."

"I have learned to seek my happiness by limiting my desires, rather than in attempting to satisfy them."

"True power lies not in the sword, but in the unity of purpose among men."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"