Calvin borrows the idea of a just war from Augustine. Everything is to be tried in order to preserve the peace before war is declared, though waging war obviously means that reparations must be made, if necessary. A consideration of such reparations naturally leads Calvin to the question of taxation. Rulers are not to be extravagant. The people have not to be tax dodgers. Nothing much has changed, has it?
Calvin here shows two things - his concern about the dangers of tyrannical government, and also his apparently relaxed attitude regarding forms of political government. You may say that he derives the possible forms from the ancient world, but in fact as a matter of logic there are only thee - rule by a king, by a few, or by all. Calvin rules out rule by everyone.
You asked me in your last letter, “As you look back over 25 years of ministry, what was the most helpful, optional spiritual discipline that you maintained for your own spiritual life and for your preaching and pastoral ministry?” I answer without hesitation: Maintaining a steady diet of Puritan literature.
The sacraments have always been a point of contention in the church. Someone once said that the sacraments serve as a litmus test of the strength or weakness of a system of theology. This is because many aspects of what we believe, such as the doctrines of God, of Christ, of the Spirit, of Scripture, of the Church, and even of eschatology converge here and find practical outlets.
"Religion that is pure and undefiled before God, the Father, is this: to visit orphans and widows in their affliction, and to keep oneself unstained from the world" (Jam. 1:27).