Scripture:
Matthew 21:28-30 (KJ)
But what think ye? A certain man had two sons; and he came to the first, and said, Son, go work today in my vineyard. He answered and said, I will not: but afterward he repented, and went. And he came to the second, and said likewise. And he answered and said, I go, sir: and went not.
Summary:
What is obedience? More than mouthing the right words.  It is a matter of action.  Doing what God commands us to do. “Promises can never take the place of performances.”