The fifth chapter establishes Calvin’s dependence upon tradition in two different manners. First, it does so by examining those theologians upon whom Calvin relied. The chapter considers Calvin’s use of John Chrysostom, Bernard of Clairvaux, and Augustine of Hippo. Each case shows the earlier theologian’s authority for and influence upon Calvin. Then the chapter turns to three different doctrinal loci. These are the establishment of infant baptism, the Trinity, and predestination. In each instance, Calvin had to place his confidence in traditional sources, either to bolster his biblical work, or to replace what was impossible to produce biblically, as in the case of infant baptism.