From Derech Eretz (#406) http://www.simchashachaim.com/audio/individual-lectures/406-derech-eretz/

From Midos, the Supreme Test (#053) http://www.simchashachaim.com/midos/53-midos-the-supreme-test/

From Happiness (#079) http://www.simchashachaim.com/audio/individual-lectures/happiness/79-happiness/