An Unpublished Essay on the Trinity
It is common when speaking of the Divine happiness to say that God is infinitely happy in the enjoyment of Himself, in perfectly beholding and infinitely loving, and rejoicing in, His own essence and perfection, and accordingly it must be supposed that God perpetually and eternally has a most perfect idea of Himself, as it were an exact image and representation of Himself ever before Him and in actual view, and from hence arises a most pure and perfect act or energy in the Godhead, which is the Divine love, complacence and joy. The knowledge or view which God has of Himself must necessarily be conceived to be something distinct from His mere direct existence. There must be something that answers to our reflection. The reflection as we reflect on our own minds carries something of imperfection in it. However, if God beholds Himself so as thence to have delight and joy in Himself He must become his own object. There must be a duplicity. There is God and the idea of God, if it be proper to call a conception of that that is purely spiritual an idea.
If a man could have an absolutely perfect idea of all that passed in his mind, all the series of ideas and exercises in every respect perfect as to order, degree, circumstance and for any particular space of time past, suppose the last hour, he would really to all intents and purpose be over again what he was that last hour. And if it were possible for a man by reflection perfectly to contemplate all that is in his own mind in an hour, as it is and at the same time that it is there in its first and direct existence; if a man, that is, had a perfect reflex or contemplative idea of every thought at the same moment or moments that that thought was and of every exercise at and during the same time that that exercise was, and so through a whole hour, a man would really be two during that time, he would be indeed double, he would be twice at once. The idea he has of himself would be himself again.
Note, by having a reflex or contemplative idea of what passes in our own minds I don't mean consciousness only. There is a great difference between a man's having a view of himself, reflex or contemplative idea of himself so as to delight in his own beauty or excellency, and a mere direct consciousness. Or if we mean by consciousness of what is in our own minds anything besides the mere simple existence in our minds of what is there, it is nothing but a power by reflection to view or contemplate what passes.