Holding space is deceptively simple. Holding space means being present with someone without judgment, letting arise what needs to, and just observing. Holding space involves deep compassion for others, and opening your heart to them. Often when we think of the heart and working with the heart, we think of actions and expressions. Holding space is an actionless action which takes up only description. It is being there.
For me, as a Reiki practitioner, I think of holding space as intentionally clearing a space in which I can whole heartedly, compassionately, be present with another as they open and work through what arises. I am out of the way–so to speak–in order to let them fully experience the vitality of their own energy.