[2] Deut. xiii. 6-9) ; xvii. 1-6. During the first three centuries, as long as the era of persecution lasted, the early Christians never thought of using any force save the force of argument to win back their dissident brethren. This is the meaning of that obscure passage in the _Adversus Gnosticos_ of Tertullian, in which he speaks of "driving heretics (i.e., by argument), to their duty, instead of trying to win them, for obstinacy must be conquered, not coaxed."[1] In this work he is trying to convince the Gnostics of their errors from various passages in the Old Testament. But he never invokes the death penalty against them. On the contrary, he declares that no practical Christian can be an executioner or jailer. He even goes so far as to deny the right of any disciple of Christ to serve in the army, at least as an officer, "because the duty of a military commander comprises the right to sit in judgment upon a man's life, to condemn, to put in chains, to imprison and to torture."[2] [1] _Adversus Gnosticos Scorpiace_, cap. ii, Migne, P.L., vol. 11, col. 125. [2] _De Idololatria_, cap. xvii, P.L., vol. i, col. 687. If a Christian has no right to use physical force, even in the name of the State, he is all the more bound not to use it against his dissenting brethren in the name of the Gospel, which is a law of gentleness. Tertullian was a Montanist when he wrote this. But although he wrote most bitterly against the Gnostics whom he detested, he always protested against the use of brute force in the matter of religion. "It is a fundamental human right," he says, "a privilege of nature, that every man should worship according to his convictions. It is assuredly no part of religion to compel religion. It must be embraced freely, and not forced."[1] These words prove that Tertullian was a strong advocate of absolute toleration. [1] _Liber ad Scapulam_, cap. ii, P.L., vol. i, col. 699 Origen likewise never granted Christians the right to punish those who denied the Gospel. In answering Celsus, who had brought forward certain texts of the Old Testament that decreed the death penalty for apostasy, he says: "If we must refer briefly to the difference between the law given to the Jews of old by Moses, and the law laid down by Christ for Christians, we would state that it is impossible to harmonize the legislation of Moses, taken literally, with the calling of the Gentiles.... For Christians cannot slay their enemies, or condemn, as Moses commanded, the contemners of the law to be put to death by burning or stoning."[1] [1] _Contra Celsum_, lib. vii, cap. xxvi.