All About Sabellianism By TylerR on Wed, 05/18/16 Body Banner of Truth: Sabellianism teaches that a unipersonal God reveals himself in three ‘modes’ or manifestations, so that he is successively Father, Son, and Holy Spirit. Where orthodox Trinitarians have spoken of ‘one Substance and three Persons’, Modalists speak of ‘One Substance and three modes.’ The difference is a vital one.
