Rising symbolizes our relationship with the environment.
Decline represents how we deal with other people.
This axis (up and down) represents how we clarify ourselves through relationships. Planets in phase with this axis represent what kind of relationships we are looking for and why we are looking for them.
Zenith symbolizes what you yearn for, what you think of as responsibility, and possible authority and restrictions. So zenith usually represents how you handle your social life and possible career direction.
The bottom of the world represents roots, inheritance and tradition.
This axis (zenith-nadir) shows how we grow.