Submission of Church to State
[...] the supreme right of deciding about religion, belongs to the sovereign power, whatever judgment he may make, since it falls to him alone to preserve the rights of the state and to protect them both by divine and by natural law.
[Theologico-Political Treatise, 199]
Where it is shown that authority in sacred matters belongs wholly to the sovereign powers and that the external cult of religion must be consistent with the stability of the state if we wish to obey God rightly.
[Theologico-Political Treatise, Ch. 19]