363, 1. Love and wisdom, and the volition and discernment that come from them, constitute our very life. Hardly anyone knows what life is. When people think about it, it seems like something ethereal, something with no specific image. It seems like this because people do not know that only God is life and that his life is divine love and wisdom. We can see from this that the life in us is nothing else and that there is life in us to the extent that we accept it.

We know that warmth and light radiate from the sun and that everything in the universe is a recipient, growing warm and bright in proportion to its receptivity. The same holds true as well for the sun where the Lord is, whose radiating warmth is love and whose radiating light is wisdom, as explained in part 2. It is from these two emanations from the Lord as the sun, then, that life comes.

We can tell that life is love and wisdom from the Lord from the fact that we grow sluggish as love ebbs away from us and dull as wisdom ebbs away; and if they leave us completely, we are snuffed out.

There are many forms of love that have been given their own names because they are derivatives, such as desires, cravings, appetites, and their gratifications and delights. There are many forms of wisdom, too, like perception, reflection, memory, thought, and focus on a subject. Further, there are many forms that come from both love and wisdom, such as agreement, decision, and resolve to act, among others. All of these belong to both [love and wisdom], but they are assigned their names on the basis of what is dominant and nearer to hand.

Finally, our senses are derived from these two, our sight, hearing, smell, taste, and touch, with their own pleasures and satisfactions. The appearance is that our eye is seeing, but our discernment is seeing through our eye, which is why we ascribe sight to our discernment. The appearance is that our ear is hearing, but our discernment is hearing through our ear. This is why we speak of the attentiveness and listening that are actually functions of discernment as "hearing." The appearance is that our nostrils smell and that our tongue tastes, but discernment is smelling with its perceptiveness and is tasting as well; so we refer to perceptiveness as smelling and tasting, and so on. The wellsprings of all these functions are love and wisdom; we can therefore tell that these two constitute our life.

42. The case is the same with love and wisdom, the only difference being that the substances and forms which constitute love and wisdom are not visible to the eyes as the organs of the external senses are. But still, no one can deny that substances and forms constitute those elements of wisdom and love that are called thoughts, perceptions and affections, and that these are not aerial entities flying about or flowing out of nothing, or things abstracted from real and actual substance and form which are the subjects of which they are predicated. For the brain has in it countless substances and forms which are the seat of every interior sense connected with the intellect and will.

All affections, perceptions and thoughts in those substances and forms are not exhalations from them, but are actually and really subjects which emit nothing from them, but simply undergo changes of state in accordance with the incoming stimuli that affect them, as may be seen from the observations above regarding the outward senses. (Regarding the incoming stimuli that affect them, more will be said below.)