At the deepest level, an 'open heart' is spacious presence, in which the sense of separateness between yourself and the 'other' dissolves and there is the recognition of oneness, of shared consciousness. That recognition is love. Sensing the formless essence in another and recognizing it as one with your own essence - that's what love is. All this is an intrinsic part of the awakened consciousness and the revelation of the spiritual dimension of life.
Eckhart TolleSpace has no "existence." "To exist" literally means "to stand out." You cannot understand space because it doesn't stand out. Although in itself it has no existence, it enables everything else to exist. Silence has no existence either, nor does the unmanifested.
Eckhart TolleWhatever you want to achieve is secondary: the business, the exchange of information, whatever it may be. Yes, you do that also, but there is a deeper foundation - meeting that human being in a state of shared presence.
Eckhart Tolle