The human being is spirit. But what is spirit? Spirit is the self. But what is the self? The self is a relation which relates to itself, or that in the relation which is its relating to itself. The self is not the relation but the relation's relating to itself. A human being is a synthesis of the infinite and the finite, of the temporal and eternal, of freedom and necessity. In short a synthesis. A synthesis is a relation between two terms. Looked at in this way a human being is not yet a self.
A. That Despair is the Sickness unto Death - The Sickness unto Death
Soren Kierkegaard
Feeling very sorry for something that you have done wrong at past, why? Because you mightn't or might know how to do that. A feel what is cause of your suffering in future. A feel which deal with you conscience. A feel that eats you like a worm.
Conscience-Stricken is a purify process, which helps you to be in Love, instead of hatE. In my opinion, in conscience-stricken state, your conscience is trying to be free from bad points that are made by hate; and this is enough to have Love.
Lord! Give us weak eyes for things of no account, and eyes of full clarity in all your truth.
Soren Kierkegaard - The Sickness unto Death