One of the saddest spectacles is the decay of the natural man before the work of the Spirit has been accomplished in him. When the savage dies—when a mere infant dies—when an animal dies—there is nothing that is appalling or depressing there; but when the high, the developed intellect—when the cultivated man comes to the last hours of life, and the memory becomes less powerful, and the judgment fails, and all that belongs to nature and to earth visibly perishes, and the higher life has not been yet developed, though it is destined to survive the grave for ever—even the life of God—there is here ample cause for grief; and it is no wonder that the man of genius merely should shed tears at he idea of decaying life.

We pass on to consider the Trinity in unity. All this is contained in that simple expression, “The God of peace.” God is a God of unity. He makes one where before there were two. He is the God of peace, and therefore can make peace. Now this peace, according to the Trinitarian doctrine, consists in a threefold unity. Brethren, as we remarked respecting this first of all, the distinction in this Trinity is not a physical distinction, but a metaphysical one. The illustrations which are often given are illustrations drawn from material sources: if we take only those, we get into contradiction: for example, when we talk of personality, our idea is of a being bounded by space; and then to say in this sense that three persons are one, and one is three, is simply contradictory and absurd. Remember that the doctrine of the Trinity is a metaphysical doctrine. It is a trinity—a division in the mind of God. It is not three materials; it is three persons in a sense we shall explain by and by.

In the next place I will endeavour to explain the doctrine—not to prove it, but to show its rationality, and to explain what it is.

The first illustration we endeavour to give in this is taken from the world of matter. We will take any material substance: we find in that substance qualities; we will say three qualities—colour, shape, and size. Colour is not shape, shape is not size, size is not colour. They are three distinct essences, three distinct qualities, and yet they all form one unity, one single conception, one idea—the idea for example, of a tree.

Now we will ascend from that into the immaterial world; and here to be something more distinct still. Hitherto we have had but three qualities; we now come to the mind of man, where we find something more than qualities. We will take three—the will, the affections, and the thoughts of man. His will is not his affections, neither are his affections his thoughts; and it would be imperfect and incomplete to say that these are mere qualities in the man. They are separate consciousnesses, living consciousnesses—as distinct, and as really sundered as it is possible for three things to be, yet bound together by one unity of consciousness. Now we have distincter proof than even this that these things are three. The anatomist can tell you that the localities of these powers are different. He can point out the seat of the nerve of sensation; he can localize the feeling of affection; he can point to a nerve and say, “There resides the locality of thought.”

There are three distinct localities for three distinct qualities, personalities, consciousnesses; yet all these three are one.

Once more, we will give proof even beyond all that. The act that a man does is done by one particular part of that man. You may say it was a work of his genius, or of his fancy; it may have been a manifestation of his love, or an exhibition of his courage; yet that work was the work of the whole man: his courage, his intellect, his habits of perseverance, all helped towards the completion of that single work. Just in this way certain special works are attributed to certain personalities of the Deity; the work of Redemption being attributed to one, the work of Sanctification to another. And yet just as the whole man was engaged in doing that work, so does the whole Deity perform that work which is attributed to one essential.

Once more, let us remember that principle which we expounded last Sunday, that it is the law of Being that in proportion as you rise from lower to higher life, the parts are more distinctly developed, while yet the unity becomes more entire. You find for example, in the lowest forms of animal life one organ performs several functions, one organ being at the same time heart and brain and blood-vessels. But when you come to man, you find all these various functions existing in different organs, and every organ more distinctly developed; and yet the unity of a man is a higher unity than that of a limpet. When you come from the material world to the world immaterial, you find that the more society is cultivated—the more man is cultivated—the more marvellous is the power of developing distinct powers. In the savage life it is almost all one feeling; but in proportion as the higher education advances and the higher life appears, every power and faculty developes and distinguishes itself, and becomes distinct and separate. And yet just in proportion as in a nation every part is distinct, the unity is greater, and just in proportion as in an individual every power is most complete, and stands out most distinct, just in that proportion has the man reached the entireness of his Humanity.

Now brethren, we apply all this to the mind of God. The Trinitarian maintains against the Unitarian and the Sabellian, that the higher you ascend in the scale of being, the more distinct are the consciousnesses, and that the law of unity implies and demands a manifold unity. The doctrine of Sabellianism, for example, is this, that God is but one essence—but one person under different manifestations; and that when He made the world He was called the Father, when He redeemed the world He was called the Son, and when He sanctified the world He was called the Holy Ghost. The Sabellian and the Unitarian maintain that the unity of God consists simply in a unity of person, and in opposition to this does the Trinitarian maintain that grandness, either in man or in God, must be a unity of manifoldness.

But we will enter into this more deeply. The first power or consciousness in which God is made known to us is as the Father, the Author of our being. It is written, “In Him we live, and move, and have our being.” He is the Author of all life. In this sense He is not merely our Father as Christians, but the Father of mankind; and not merely the Father of mankind, but the Father of creation; and in this way the sublime language of the prophets may be taken as true literally, “The morning stars sang together, and all the sons of God shouted for joy;” and the language of the canticle which belongs to our morning service, “the deeps, the fountains, the wells,” all unite in one hymn of praise, one everlasting hallelujah to God the Father, the Author of their being. In this respect, simply as the Author of life, merely as the supreme Being, God has reference to us in relation to the body. He is the Lord of life: in Him we live, and move, and have our being. In this respect God to us is as law—as the collected laws of the universe; and therefore to offend against law, and bring down the result of transgressing law, is said in Scripture language, because applied to a person, to be provoking the wrath of God the Father.