The “Prologue” of Bonaventure’s Mind's Journey into God

Bonaventure begins (§1) by “calling upon the First Beginning. . .”  What type of address is this? How does this alert us to notice the sort of work we are dealing with here?

In the last paragraph of our extract (§4) Bonaventure sets up some contrasts that he believes are crucial for entering upon the journey toward God.  Do any of these provide you with insights about necessary preconditions for intellectual study?  Which ones, if any?