Complex sentence: Such pursuit has long been an integral part of the religious life of humanity and within established religion has been explicitly expressed within monasticism where rules governing the everyday life of monks and nuns provide a framework conducive to the cultivation of mystical states of consciousness.
Split into simpler sentences: Such pursuit has long been an integral part of the religious life of humanity. Within established religion it has been explicitly expressed within monasticism, where rules governing the everyday life of monks and nuns provide a framework conducive to the cultivation of mystical states of consciousness.