You cannot demand military service of Christians any more than you can of priests. We do not go forth as soldiers with the Emperor even if he demands this.
OrigenThe Scripture, which tells us not to be angry at all, and which says in the thirty-seventh Psalm, Cease from anger, and forsake wrath, and which commands us by the mouth of Paul to put off all these, anger, wrath, malice, blasphemy, filthy communication, would not involve God in the same passion from which it would have us to be altogether free.
OrigenEvery soul that is born into flesh is soiled by the filth of wickedness and sin. . . . In the Church, baptism is given for the remission of sins, and, according to the usage of the Church, baptism is given even to infants. If there were nothing in infants which required the remission of sins and nothing in them pertinent to forgiveness, the grace of baptism would seem superfluous
OrigenEvery soul... comes into the world strengthened by the victories or weakened by the defeats of its' previous life. Its' place in this world as a vessel appointed to honor or dishonor, is determined by its' previous merits or demerits. Its' work in this world determines its' place in the world which is to follow this.
Origen