Repent Oh Ye Sinner!
Nope, that's not our style. T'shuva is the hebrew word that is often translated as repentence. Yet, that's not the point. For that matter, what does 'repent' even mean?
Alternate and more meaningful translations are return and reconnect. One, G-d forbid, has moved away from holiness, has, due to one's actions, become disconnected from G-d. To 'do t'shuva', or to 'repent' is to return, to reconnect in one's relationship with G-d and the holiness that entails.
In kabbalistic terminology, it's noted that in hebrew to return is 't'shuv'. The 'a' at the end is a hebrew letter hey. In other words, t'shuva is to return the hey.
T'shuva breaks the wall and reconnects the soul to it's divine source, it returns the hey (the hebrew letter) to G-d's name.
More on the subject can be seen here: 2 Levels of T'Shuva