The repetition of the number 9 in this Angel Number is significant because it represents the end of a phase. The number 4 indicates that the Archangels have gathered to help you transition to a new period of growth.
There is a certain amount of responsibility on you to cut ties with the past. You must accept your previous mistakes, acknowledge that you have learned from them, and commit yourself to better choices.
No one is perfect, and you must accept your own imperfections before you can move forward.