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.