من أنكر شيئًا من تعاليم المسيح ولم يُصدّقه، فقد أنكر أنّ الله أرسله، وبالتالي أنكر أنّه المسيح المنتظر، وبذلك يكفّ عن أن يكون مسيحيًّا.

“He that denies any of the doctrines that Christ has delivered, to be true, denies him to be sent from God, and consequently to be the Messiah; and so ceases to be a Christian.”John Locke — The Works of John Locke: The reasonableness of Christianity. A vindication of the Reasonableness of Christianity, from Mr. Edward's reflections. A second vindication (1824)