Complex sentence: At the age of sixteen, Venkataraman lost his sense of individual selfhood, an awakening which he later recognised as enlightenment and about six weeks later left his home and travelled to the holy mountain Arunachala, Tiruvannamalai, where he remained for the rest of his life.
Split into simpler sentences: At the age of sixteen, Venkataraman lost his sense of individual selfhood, an awakening which he later recognised as enlightenment. About six weeks thereafter he left his home and travelled to the holy mountain Arunachala, Tiruvannamalai, where he remained for the rest of his life.