Complex sentence: Besides achieving physical and mental health, people who have advanced towards individuation, they tend to become harmonious, mature, responsible, they promote freedom and justice and have a good understanding about the workings of human nature and the universe.
Split into simpler sentences: Besides achieving physical and mental health, people who have advanced towards individuation tend to be harmonious, mature and responsible. They embody humane values such as freedom and justice and have a good understanding about the workings of human nature and the universe.