Brevis admonitio Joannis Calvini ad fratres Polonos, ne triplicem in Deo essentiam pro tribus personis imaginando, tres sibi Deos fabricent

John Calvin confronts the Polish reformers who threatened to fracture the unity of the Godhead. This letter exposes the logical traps of their anti-Trinitarian arguments and defends the classic Christian view of the Mediator.