6190. As the subject here treated of is Influx, and this is mentioned so frequently, it is necessary to say in advance what influx is. What is meant by spiritual influx cannot be better seen than by means of the natural influxes which take place and appear in this world-as by the influx of heat from the sun into all things of the earth, with all variety in accordance with the seasons of the year and the climates of the earth; and by the influx of light into the same, with all variety likewise in accordance with the times of the days and also of the years, also in a varied manner according to the climates. 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 support to that life, and also colors and displays of beauties; in like manner from the influx of the same heat into the surface of our bodies, and also of light into the eye; likewise from the influx of sound into the ear; and from other instances of a similar kind, it may be comprehended what is the influx of life from the Lord, who is the Sun of heaven, from whom comes heavenly heat, which is the good of love, and heavenly light, which is the truth of faith. The influx of these is also plainly felt, for heavenly heat which is love produces the vital heat which is in man, and heavenly light which is faith produces his understanding, because the truth of faith which proceeds from the Lord enlightens his intellectual; but in both cases with much variety, for it is according to the reception on the part of man.