Sri Bhagwan spells out the basic principles of human qualities and behaviours. The Bhagwan explains how three psychosomatic factors (Satwa, Rajas and Tamas) drive human values, attributes, behaviours and actions. All our thinking and actions depends on these. Rest is self - explanatory in diagram below.
All human behaviours and characters are some combination of Satoguna, RajoGuna and TamoGuna, with one of them dominating, hence three types of behaviours are by nature
Some examples are mentioned below. For more, read Chapters 14, 15, 16, 17 and 18.