 Heppenstall was one of the most influential scholars to come out against M. L. Andreasen's final generation theology.While upholding the "pillar" doctrines of the Adventist pioneers, he moved forward on the understanding on such issues as the human nature of Christ and the atonement.He emphasized, as did Questions on Doctrine, the atonement on the cross with a continuing ministry in heaven in the antitypical Day of Atonement.