“…Unlike Voetius, Van Velthuysen did not write a treatise devoted to state and Church relationships, but the contours of his theologico-political argument, comprising biblical interpretation, the fundamental articles of Faith, the nature of the Church, and its relation to the state, are clearly visible in the Dutch pamphlets he wrote during the 1660s. According to his Tractaet van de Afgoderye en Superstitie (Treatise on idolatry and superstition), the purest act of idolatry-unsurprisingly, considering Van Velthuysen's Protestant persuasionsis the Roman Catholic Mass, described by the Heidelberg Catechism (question 80) as an "accursed idolatry" [45] (p. 1). Yet, Van Velthuysen's aim is not to participate in confessional polemics, but to adjust the balance between the Magistrate's duty to defend true religion and the liberty of conscience.…”