The equinoxes are magical points in time when the day and night are of equal lengths. These are times of balance and correspond roughly to the ascendant/descendant axis in the birthchart. The spring equinox (in the tropical system) takes place with the Sun at 0 degrees Aries, correlating with the ascendant and first house, and the fall equinox occurs at 0 degrees Libra, correlating with the descendant and seventh house.
With Aries and Libra we are dealing with two points of initiation: initiation of the Self (Aries) and initiation of the Other (Libra). The distinction between Self and Other is a little blurry right now with Venus (connecting with others) having just passed an exact opposition to Neptune. We feel creative and inspired now, but the Self is a little more difficult to access. The opposition between Mars and Pluto has been square to the Sun, forming a T-square which has intensified the energies of that dynamic which is still in force for the equinox.
Other influences are at play now as well (see chart): Jupiter is approaching its final square to Uranus which is accelerating the expansion of a new (Uranus) vision (Jupiter) and new ways of living the human experience, and Saturn is approaching a conjunction to the South Node which will test (Saturn) our attachment to the patterns from the past (South Node) that no longer work for us.
This is a time to moving forward, of becoming unstuck from the glue of our ancestral, family and personal histories. Saturn in Virgo helps us to create a plan and a strategy but tends to be overly cautious when exposed to the wildly visionary influence of Jupiter and Uranus.
This image by beautifully echoes this theme. The two individuals are separate yet connected by a force of spiraling energy that ascends from matter into spirit. Day and night are equally balanced, with the Sun ruling one half of the painting and the Moon the other. A new being grows in the waters of consciousness that grounds the image, and the higher selves of the two individuals ascend into a multidimensional field of new awareness.
Balance is the keyword for this Equinox experience: not only between the Self and the Other of the Equinox itself, but also a balance between being rooted on the Earth (Saturn/South Node) and ascending into spirit (Jupiter/Uranus).