Askesis is not simply the practice of certain specific disciplines, it is an entire way of life, a lifestyle… Askesis is washing out the stone and sand to get to the gold.
This passage offers the most comprehensive positive definition of askesis in the corpus, framing it as a holistic existential orientation aimed at restoring the divine image rather than a catalogue of discrete penances.
, Philokalia: The Bible of Orthodox Spirituality, 1998thesis