§ 2. Theological Method.

Every science has its own method, determined by its peculiar nature. This is a matter of so much importance that it has been erected into a distinct department. Modern literature abounds in works on Methodology, i.e., on the science of method. They are designed to determine the principles which should control scientific investigations. If a man adopts a false method, he is like one who takes a wrong road which will never lead him to his destination. The two great comprehensive methods are the à priori and the à posteriori. The one argues from cause to effect, the other from effect to cause. The former was for ages applied even to the investigation of nature. Men sought to determine what the facts of nature must be from the laws of mind or assumed necessary laws. Even in our own day we have had Rational Cosmogonies, which undertake to construct a theory of the universe from the nature of absolute being and its necessary modes of development. Every one knows how much it cost to establish the method of induction on a firm basis, and to secure a general recognition of its authority. According to this method, we begin with collecting well-established facts, and from them infer the general laws which determine their occurrence. From the fact that bodies fall toward the centre of the earth, has been inferred the general law of gravitation, which 4we are authorized to apply far beyond the limits of actual experience. This inductive method is founded upon two principles: First, That there are laws of nature (forces) which are the proximate causes of natural phenomena. Secondly, That those laws are uniform; so that we are certain that the same causes, under the same circumstances, will produce the same effects. There may be diversity of opinion as to the nature of these laws. They may be assumed to be forces inherent in matter; or, they may be regarded as uniform modes of divine operation; but in any event there must be some cause for the phenomena which we perceive around us, and that cause must be uniform and permanent. On these principles all the inductive sciences are founded; and by them the investigations of natural philosophers are guided.

The same principle applies to metaphysics as to physics; to psychology as well as to natural science. Mind has its laws as well as matter, and those laws, although of a different kind, are as permanent as those of the external world.

The methods which have been applied to the study of theology are too numerous to be separately considered. They may, perhaps, be reduced to three general classes: First, The Speculative; Second, The Mystical; Third, The Inductive. These terms are, indeed, far from being precise. They are used for the want of better to designate the three general methods of theological investigation which have prevailed in the Church.