Here we have the solution of the common mistake of supposing that there is a contrariety and antagonism between a dogmatic creed and vital religion. People urge that salvation consists, not in believing the propositions that there is a God, that there is a Saviour, that our Lord is God, that there is a Trinity, but in believing in God, in a Saviour, in a Sanctifier; and they object that such propositions are but a formal and human medium destroying all true reception of the Gospel, and making religion a matter of words or of logic, instead of its having its seat in the heart. They are right so far as this, that men can and sometimes do rest in the propositions themselves as expressing intellectual notions; they are wrong, when they maintain that men need do so or always do so. The propositions may and must be used, and can easily be used, as the expression of facts, not notions, and they are necessary to the mind in the same way that language is ever necessary for denoting facts, both for ourselves as individuals, and for our intercourse with others. Again, they are useful in their dogmatic aspect as ascertaining and making clear for us the truths on which the religious imagination has to rest. Knowledge must ever precede the exercise of the affections. We feel gratitude and love, we feel indignation and dislike, when we have the informations actually put before us which are to kindle those several emotions. We love our parents, as our parents, when we know them to be our parents; we must know concerning God, before we can feel love, fear, hope, or trust towards Him. Devotion must have its objects; those objects, as being supernatural, when not represented to our senses by material symbols, must be set before the mind in propositions. The formula, which embodies a dogma for the theologian, readily suggests an object for the worshipper. It seems a truism to say, yet it is all that I have been saying, that in religion the imagination and affections should always be under the control of reason. Theology may stand as a substantive science, though it be without the life of religion; but religion cannot maintain its ground at all without theology. Sentiment, whether imaginative or emotional, falls back upon the intellect for its stay, when sense cannot be called into exercise; and it is in this way that devotion falls back upon dogma. § 2. Belief in the Holy Trinity.