Mourning Our Lost Selves and the Emotions of Repentance

From KMTT - the Torah Podcast by KMTT.

Rav Soloveitchik on Teshuva (8): Mourning Our Lost Selves and the Emotions of Repentance, by Rav Dovid Gottlieb

Eighth in a series of mini-shiurim on R Soloveitchik's approach to Teshuva based on his famous and incredible sefer Al HaTeshuva. 

What are the primary emotions associated with teshuva and how do they motivate us to repent?