6128. And he provided them with bread [in exchange] for all their cattle. That this signifies sustenance through the influx of good from the internal, is evident from the signification of "providing with bread," or giving them bread, as being the sustenance of the spiritual life (of which above, n. 6118); from the signification of "cattle," as being the good of truth (of which just above, n. 6126); and from the representation of Joseph who provided them, as being the internal (as also above). That it was through the influx of good from the internal, follows, because all the sustenance of spiritual life in the natural is effected by means of influx from the internal, that is, from the Lord through the internal. As mention is so frequently made of influx, and perhaps few know what is meant by influx, it is necessary to state what it is. The nature of influx may be seen from a comparison with such things as inflow in nature, as from the influx of heat from the sun into all things of the earth, whence comes vegetative life; and from the influx of light into the same, whence comes what is helpful to vegetative life, and besides is the source of the consequent colors and beauties; in like manner from the influx of heat into the surface of our bodies, and also of light into the eye; in like manner from the influx of sound into the ear; and so on. From this it may be comprehended what is the influx of life from the Lord, who is the Sun of heaven, from whom comes the heat which is love, and the spiritual light which is faith. Moreover the influx itself is plainly felt; for heavenly heat, which is love, causes the vital heat which is in man; and heavenly light, which is faith, causes the intellectual light which is in man; but these are varied according to the reception.