Struggle with understanding the unity aspect of the Trinity? Many do and have. For instance, one heretical group in the Middle East was known to Mohammed, and as such, the Qur'an says that Christians believe in three, not one God. What does Scripture say? Calvin explains: ________________________________________________ Moreover, because God more clearly disclosed himself in the coming of Christ, thus he also became known more familiarly in three persons. But of the many testimonies this one will suffice for us. For Paul so connects these three—God, faith, and baptism [Eph. 4:5]—as to reason from one to the other: namely, because faith is one, that he may thereby show God to be one; because baptism is one, that he may thence show faith also to be one. Therefore, if through baptism we are initiated into the faith and religion of one God, we must consider him into whose name we are baptized to be the true God. Indeed, there is no doubt that Christ willed by thi...