Neptune Square North Node
Neptune represents our subconscious mind. It is associated with dreams, inspiration, psychic receptivity and illusion. It is also associated with intuition and spiritual enlightenment. It is also a planet of mercy and compassion. In your chart, if Neptune is well aspected will indicate a great inner sensitivity, to manifest dreams and become highly creative. Negatively, it will indicate deception, deceit and addiction.
Neptune Square North Node
The Moon's Nodes are related to the subconscious, the domain of the Moon. Thus, the South Node represents subconscious motivations that stem from the past and to which there is an inner inclination to cling although they may no longer be relevant or appropriate to the individual's situation and prospects, while the North Node represents conscious motivations relevant to the present and future, characterized by a desire for the unfoldment of appropriate changes in personal psychology.
An outer planet in conjunction with one of the lunar nodes is a planet of special significance. This increases the importance of that Neptune throughout life.
Some people within astrology consider squares to the lunar nodes as ‘skipped steps’ lessons you struggled to complete in a past life and are now forced to address in this life with heavier karmic debt. With nodal squares, there can be these frustrating or even painful repeated themes that are continuously brought up in your life, to nudge you to fulfill your karmic lessons in this life since you failed to do so in the past (South Node).
With North Node square Neptune, you possess many visionary gifts. When working through its higher form, you succeed in many artistic and creative fields. There are cinematographers, filmmakers, painters, artists, sign makers, photographers, dancers, singers, musicians, actors, and designers that have this aspect.
It is questionable if you will put your unique gifts to superlative use, however. The liabilities are high with South Node conjunct Neptune. You might have led a mystic kind of life and it may be difficult to draw you out, though you could share spiritual insights that contribute to the overall karmic growth on the planet, but you may prefer to stay out of the limelight. Or you dislike the mainstream society and enjoy living within your imaginative and spiritual realms.
Your work may require seclusion and you may become a reclusive type or hermit who prefers the background. You may be so sensitive that you want to hide away. This is an emotional aspect, especially when falling in water signs. The South Node influence may distort the emotions, which fuels the mind. You may not feel like they are part of this world, as if you live in an alien world. Such feelings of alienation and psychic distortions increase the chances you will resort to drugs or other strange methods for handling their crises. The house of Neptune and its opposing house shows where the imagination and vision are enhancing those affairs or merely distorting things.