=1. Importance of Theological Study.=--In the short period of time that measures the span of mortal existence, it is not possible for man to explore any considerable portion of the vast realm of knowledge; it becomes, therefore, the part of wisdom to select for study the branches that promise to prove of the greatest worth. All truth is of value--above price indeed in its place; yet with respect to their possible application, some truths are of incomparably greater worth than are others. A knowledge of the principles of trade is essential to the success of the merchant; an acquaintance with the laws of navigation is demanded of the mariner; familiarity with the relation of soil and crops is indispensable to the farmer; an understanding of the profound principles of mathematics is necessary to the engineer and the astronomer; so too is a practical knowledge of God essential to the salvation of every human soul that has attained to powers of judgment and discretion. The value of theological knowledge, therefore, ought not to be under-rated; it is doubtful if its importance can in any way be over-estimated. =2. What is Theology?=--The word "theology" is of Greek origin; it comes to us from _Theos_, meaning God, and _logos_--a treatise, or discourse, signifying by derivation, therefore, collated knowledge of Divinity, or the science that teaches us of God, implying also the relation existing between the Supreme Being and His creatures. The term is of very ancient usage, and may be traced to pagan sources. Plato and Aristotle speak of theology as the doctrine of Deity and divine things. Concisely defined, theology "is that revealed science which treats of the being and attributes of God, His relations to us, the dispensations of His providence, His will with respect to our actions, and His purposes with respect to our end."[1] [1] See Doc. & Cov. supplement to Lecture I on Faith; Buck's Theological Dictionary, p. 582. =3.= It has been held by some as a truth, that theological knowledge is not properly a subject for analytical and otherwise scientific treatment on the part of man; that inasmuch as a true conception of Deity, with which theology has primarily to deal, must necessarily be based upon revelation from the source divine, we can but receive such knowledge as it is graciously given; and that to attempt critical investigation thereof by the fallible powers of human judgment would be to apply as a measure of the doings of God the utterly inadequate wisdom of man. Many truths are beyond the scope of unaided human reason, and theological facts have been declared to be above reason; this is true so far as the same remark might be applied to any other kind of truth; for all truth, being eternal, is superior to reason in the sense of being manifest to reason, but not a creation of reason; nevertheless truths are to be estimated and compared by the exercise of reason.