I’ve learned that fear is simply an illusion based on past experiences that we project into the present and onto the future.
You let go of the past, and stop bringing the past into the present and replaying it into the future. You release guilt, shame, and you can create an entirely new pattern for yourself.
I believe in any kind of personal growth practice that can help you gather the tools that you can then apply to resentment, anger, pain, and rage in order to heal your past resentments toward yourself and others, and then deal with them in the moment so you don't carry them for a decade or more.