The shortcut of forgetfulness is better.

Forget—if you can—the sins you have committed in the flesh. 

You cannot escape the effects of those causes, but you can avoid strengthening the tie with sin—you can avoid going back to earth self-hypnotised with the idea that you are a sinner.

Do not brood over sin. 

It is true that you can exhaust the impulse to sin by dwelling on it until your soul is disgusted, but that is a slow and an unpleasant process. 

The shortcut of forgetfulness is better.