The thought, too, though not fundamentally changed, was rearranged and developed.

Only in the redaction of 1541 was {163} predestination made perfectly clear.

The first edition, like Luther's catechism, took up in order the Decalogue, the Creed, the Lord's Prayer, and the Sacraments.

To this was added a section on Christian liberty, the power of the church, and civil government.

In the last edition the arrangement followed entirely the order of articles in the Apostles' Creed, all the other matter being digested in its relation to faith.
[Sidenote: A system of theology] In the _Institutes_ Calvin succeeded in summing up the whole of Protestant Christian doctrine and practice.