Godly sorrow is not an enemy but a friend to holy joy. I have read of a holy man who, lying upon his sickbed and being asked which were his joyfulest days that ever he had, cried out, "O give me my mourning days, give me my mourning days again, for they were the joyfulest days that ever I had." The higher the springs of godly sorrow rise, the higher the tides of holy joy rise; his graces will flourish most who evangelically mourns most. Grace always thrives best in that garden (that heart) that is watered most with the tears of godly sorrow. He that grieves most for sin will rejoice most in God, and he that rejoices most in God will grieve most for sin.
Someone who is grieved because he has sinned is grieved in a godly way, because he is sorry to have done something that God hates. This godly sorrow is directly related to the enduring quality of his salvation.
I'm angry with myself that I'm unable to rejoice from my heart and be thankful to God... I am joyful in spirit but I am sad according to the flesh.... It's strange to know that she is surely at peace... and yet to grieve so much.