Change is a good thing in many ways (whether it's a positive or negative impact on your life). It keeps you on your toes, it keeps your mind and physical nature active, it's a natural adaptation of life as it evolves.
It's a constant which helps you keep learning and challenging yourself and appreciate the elements of your life you may not have previously considered. For example the death of my father was one of the most negative experiences of my life and I still grieve for him.
However the challenge of accepting his death and the considerable change in my life where my father was no longer a part of has in the long term helped me with my grieving process by making me question and appreciate the natural progression of life and death, of family, bonding and love, particularly unconditional love, never taking things for granted.
Change can be a difficult thing to process but ultimately, I believe accepting and moving with change is part of Darwin's model of survival of the fittest.