"That you now realize that your behavior was wrong and you are lamenting because of that behavior is the right attitude. This means that you are no longer blaming others for your own shortcomings. Lord Caitanya is pleased by this attitude, and if you can maintain it, He will give you His mercy. He will always accept an offering of love if His devotee repents for his/her past misbehavior.
(Collected Letters to My Disciples, Vol 3, Pg 52, 2nd Paragraph)"