The only “proper” way to be a Christian is to accept Jesus Christ as your Lord and Savior. Once you have become one of his, you can’t change your mind. If you change your mind, you were never saved to begin with.
Calvin would be happy with your assessment.
A perfect illustration of the "No true Scotsman" logical fallacy.
Hasn't accepting Jesus as our Lord and Savior always been the definition of a Christian? Of course, I happen to be a Catholic but I ASSUME that's true. It's what I was brought up with.