Is there any mention of purification in the suttas? "Visuddhi" appears to be the Pali word for purification (i.e. Visuddhimagga). But I'm curious to find early sources talking about purification and how it happens.
As I understand it, when we view experience with mindfulness, equanimity, compassion, etc. we are undoing sankharas, leading to purification (and eventually to awakening). I think I read this in Hart/Goenkaji's Art of Living.