Water is the emotional self. It is also our contact with the unconscious, both personal and collective. Neptune was discovered in 1846, after its position was predicted mathematically. Isn’t it just like emotion not to explain itself truly until rationality is put into play?
In astrology, Neptune is our dreamy side and it helps us formulate hopes and aspirations. On the negative, it can enslave us with unrealistic expectations and even addictions. It co-rules (with Jupiter) the astrological sign of Pisces, perhaps the least grounded of all signs. Its rulership of this sign gives a clue as to its ability to put us into contact with our intuitive parts. Perhaps that is why it’s considered a higher octave of the Moon.
Recall that the Moon is paired with the High Priestess (the post for the Moon is here), the mistress of memory and intuitive connection. There is a decidedly feminine emphasis here; also the Hanged Man (post on the Hanged Man is here) reminds us to look beneath the surface, not to take things at face value. In other words, there more to life than what the senses tell us.
The note for Neptune and the Hanged Man is G#, because of the relationship with the High Priestess.
Here is an essential point: Rationality without emotion is cold, while emotion without reason is unfocused. It is again, no surprise, about balance. The lessons of Neptune and the Hanged Man are indispensable. They ask us to dream and to hope. Without that, life becomes meaningless and pointless. Out of Cosmic Memory comes the true sense of connection with something greater.
Let Neptune bring you to the heights of fantasy and dreams, while you keep yourself tethered to the physical. This is the formula for making dreams into reality.