Fulton J. Sheen said this quote

Holiness must have a philosophical and theological foundation, namely, Divine truth; otherwise it is sentimentality and emotionalism. Many would say later on, 'We want religion, but no creeds.' This is like saying we want healing, but no science of medicine; music, but no rules of music; history, but no documents. Religion is indeed a life, but it grows out of truth, not away from it. It has been said it makes no difference what you believe, it all depends on how you act. This is psychological nonsense, for a man acts out of his beliefs. Our Lord placed truth or belief in Him first; then came sanctification and good deeds. But here truth was not a vague ideal, but a Person. Truth was now lovable, because only a Person is lovable. Sanctity becomes the response the heart makes to Divine truth and its unlimited mercy to humanity.