The Word was with God, and God was the Word. In Him was life, and the life was the light of men (John 1:1, 4).
By “God” here the Divine love is meant, and by “the Word” the Divine wisdom; and strictly speaking “life” means the Divine wisdom, and the life strictly is the light that goes forth from the sun of the spiritual world, in the midst of which sun is Jehovah God.
As fire forms light so does the Divine love form life. In fire there are two properties, burning and shining; from its burning property heat proceeds, and from its shining property, light.
There are two like properties in love, one to which the burning property of fire corresponds, which is a something that inmostly affects the will of man, and another to which the shining property of fire corresponds, which is a something that inmostly affects the understanding of man. This is the source of man’s love and intelligence
From the sun of the spiritual world a heat goes forth that in its essence is love, and a light that in its essence is wisdom. These two flow into all things and each thing in the universe, and inmostly affect them, and with men these flow into their will and their understanding, for these two were created to be receptacles of influx – the will a receptacle of love, and the understanding a receptacle of wisdom. Thus it is manifest that the life of man dwells in his understanding, and is such as his wisdom is; and that it is modified by the love of the will.
We also read in John:
As the Father hath life in Himself, so hath He given to the Son also to have life in Himself (5:26)
which means that just as the Divine Itself, which was from eternity, has life in itself, so the Human, which He took on in time, has life in itself.
Life in itself is the very and only life, from which all angels and men have life.
This can be seen by human reason from the light that goes forth from the sun of the natural world, in that this light is not creatable, but that forms for receiving it have been created.
For example, the eyes are forms for receiving this light, and light flowing in from the sun is what makes them to see. The same is true of life which (as has been said) is the light that goes forth from the sun of the spiritual world, in that it is not creatable, but flows in unceasingly, and as it illuminates it also vivifies man’s understanding.
So in consequence, as sight and life and wisdom are one, wisdom is not creatable, neither is faith, nor truth, nor love, nor charity, nor good; but forms for receiving these have been created; and these forms are human and angelic minds. Therefore let everyone beware of persuading himself that he lives from himself, or that he is wise, believes, loves, perceives truth, and wills and does good, from himself. For so far as anyone is so persuaded he casts his mind down from heaven to earth, and from being spiritual becomes natural, sensual, and corporeal; for he shuts up the higher regions of his mind, and thus makes himself blind in regard to every thing relating to God, heaven, and the church; and then all that he happens to think, reason, and say about these things is done in darkness and consequently in foolishness; while at the same time he adopts a confidence that it all belongs to wisdom. For when the higher regions of the mind, where the true light of life resides, are closed up, the region of the mind below these opens, into which the light of the world only is admitted; and when this light is separated from the light of the higher regions it is a delusive light, in which what is false seems true and what is true seems false, and reasoning from what is false appears to be wisdom, and from what is true to be folly. Then man believes himself to be endowed with the keen vision of an eagle, although he sees what belongs to wisdom no better than a bat sees in the light of day.