Beyond even any teaching, though, the aspect of spiritual life that is the most profound is the element of grace. Grace is something that comes to us when we somehow find ourselves completely available, when we become open-hearted and open-minded, and are willing to entertain the possibility that we may not know what we think we know. In this gap of not knowing, in the suspension of any conclusion, a whole other element of life and reality can rush in. This is what I call grace.
From Falling Into Grace, Insights on the end of suffering by Adyashanti