(_f_) _The enlightening influence of the Holy Spirit._ As only the Spirit fathoms the things of God, so only he can illuminate our minds to apprehend them. _1 Cor. 2:11, 12—_“the things of God none knoweth, save the Spirit of God. But we received ... the Spirit which is from God; that we might know.” Cicero, Nat. Deorum, 66—“Nemo igitur vir magnus sine aliquo adfiatu divino unquam fuit.” Professor Beck of Tübingen: “For the student, there is no privileged path leading to the truth; the only one which leads to it is also that of the unlearned; it is that of regeneration and of gradual illumination by the Holy Spirit; and without the Holy Spirit, theology is not only a cold stone, it is a deadly poison.” As all the truths of the differential and integral calculus are wrapped up in the simplest mathematical axiom, so all theology is wrapped up in the declaration that God is holiness and love, or in the protevangelium uttered at the gates of Eden. But dull minds cannot of themselves evolve the calculus from the axiom, nor can sinful hearts evolve theology from the first prophecy. Teachers are needed to demonstrate geometrical theorems, and the Holy Spirit is needed to show us that the “new commandment” illustrated by the death of Christ is only an “old commandment which ye had from the beginning”_ (1 John 2:7)_. The Principia of Newton is a revelation of Christ, and so are the Scriptures. The Holy Spirit enables us to enter into the meaning of Christ’s revelations in both Scripture and nature; to interpret the one by the other; and so to work out original demonstrations and applications of the truth; _Mat. 13:52—_“Therefore every scribe who hath been made a disciple of the kingdom of heaven is like unto a man that is a householder, who bringeth forth out of his treasure things new and old.” See Adolph Monod’s sermons on Christ’s Temptation, addressed to the theological students of Montauban, in Select Sermons from the French and German, 117-179. II. Divisions of Theology. Theology is commonly divided into Biblical, Historical, Systematic, and Practical. 1. _Biblical Theology_ aims to arrange and classify the facts of revelation, confining itself to the Scriptures for its material, and treating of doctrine only so far as it was developed at the close of the apostolic age.