It is natural that the spiritual master will forgive the disciple, especially if the disciple is sincere in his apology. But the forgiveness is not cheap. The disciple has to actually be really prepared to beg forgiveness for his particular mistakes and promise not to do them again. Then real forgiveness is possible. The disciple must be convinced that he doesn't want to make the same mistake again and the spiritual master must be patient and forgiving.
Lectures from a disciple, Vol 1, Pg 67, last paragraph