This is how I describe soul space. It comes from my experience of prayer and service.
There is a space within us where words of affirmation and approval are gently spoken. This is our soul space. It is accessed by silence.
There is a space between us where the things we carry in our hearts are shared. This also is a soul space. It is called companionship.
The earth too is a soul space. It is a space of abundance and beauty created by God. It needs to be cared for and respected.