When we believe thoughts coming from a contracted mind we are in dukkha. When we see them clearly as empty and not self, there's wisdom.
This talk also explores the 4 Iddhipadas-different temperaments and sources of motivation in practice.
The habit of believing we're different from others leads to a painful sense of isolation. Both vipassana and metta reveal a deep inter-connectedness to all of life that takes away our feelings of separation.