In the Bible, things that are lower down, or under, physically, generally represent things that are lower or more external spiritually. In some cases, the lower things have been separated and put away to protect the good, but in others, it can mean that a less exalted idea or good desire is supporting a more exalted one.

(References: Arcana Coelestia 4564 [1-2], 8610, 9656)

5668. 'And gave them water' means a general influx of truth from the internal. This is clear from the meaning of 'water' as truth, 2702, 3058, 3414, 4976, in this case truth in general. This is why 'giving water' means a general influx of truth; and the reason it comes from the internal is that this took place in Joseph's house, 5667. A general influx of truth is enlightenment that makes it possible for truth to be discerned and understood. This enlightenment is provided by the light of heaven which flows from the Lord, a light which is nothing else than Divine Truth, 2776, 3138, 3167, 3195, 3222, 3339, 3485, 3636, 3643, 3993, 4302, 4413, 4415, 5400.