Insight practice is all about understanding the three characteristics to such a depth that we may see beyond the three illusions and enter ultimate reality through one of the three doors, which is a metaphorical way of describing the few moments before a Fruition. Stages twelve through fourteen and subsequent attainments of Fruition at that level of awakening present a radical and complete understanding of the three characteristics at the level of formations, that is, at the level of the whole sensate universe, lasting three or four moments of one-tenth to a quarter of a second each. As
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