Only he who is capable of a genuine encounter with the other is capable of an authentic encounter with himself, and the converse is equally true...From this perspective, every spiritual exercise is a dialogue, insofar as it is an exercise of authentic presence, to oneself and to others.

Pierre Hadot (1922 CE-2010 CE), Pierre Hadot was a French philosopher and historian of philosophy specialising in ancient philosophy, particularly Neoplatonism.