Complex sentence: It is a lesson which we should never forgot even after "the corpse-weight of learnings cease", because it is the first lesson taught us by the midwives who tore our umbilical cords the moment we were born.
Split into simpler sentences: It is a lesson which we should not forgot even after "the corpse-weight of learnings cease". The lesson was taught us by the midwives who tore our umbilical cords the moment we were born.