“In theory, there is no difference between theory and practice. But in practice, there is.”
“Theory is the practice of the impotent.”
“The Law of Attraction is a theory. Cosmic Ordering is a practice putting that theory to work.”
“The equally is a political theory, but no a practical politics.”
“That's fine in practice, but will it work in theory?”
“My theory is to enjoy life, but the practice is against it.”