Something I've heard a lot and spread in my life:

Choose to be defined by your troubles.

Or choose to be defined by how you thrive in spite of them.

The meaning being: you can either focus on the bad parts of your past and how they affect you now and let that define you as a person, or you can handle your shit, move on with your life and learn to thrive in spite of all of that nonsense. It will change your life if you really take it to heart. I cured my depression because I took this to heart and decided to stop feeding the beast of cyclical negativity in my life and moved beyond that, and built something beautiful.