Arcana Coelestia # 6346
6346. 'Light as water' means that faith alone does not possess such qualities, neither glory nor powerfulness. This is clear from the meaning of 'being light as water' as having no weight or worth. The fact that faith alone is meant, that is, faith separated from charity, is evident from the things mentioned in what follows that involve Reuben, and that involve Simeon and Levi. Those men - Reuben, Simeon, and Levi - are used here also to refer to faith alone or faith separated from charity.
Daniel 2:34-35
34
You saw until a stone was cut out without hands, which struck the image on its feet that were of iron and clay, and broke them in pieces.
35
Then was the iron, the clay, the brass, the silver, and the gold, broken in pieces together, and became like the chaff of the summer threshing floors; and the wind carried them away, so that no place was found for them: and the stone that struck the image became a great mountain, and filled the whole earth.
