Who said "Motivation is the fuel, but discipline is the engine."?

This quote is attributed to Romain Rolland.

Motivation is the fuel, but discipline is the engine. - Romain Rolland

"Motivation is the fuel, but discipline is the engine."

Romain Rolland Motivation

Novelist Musician French 1866–1944

"Life is a beautiful struggle."

"Art is the effort of man to express the unspoken."

"Music is the one incorporeal entrance into the higher world of knowledge."

"Love is life's blood."

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."