I spent most of my life in a comfort zone assuming that's it. I was wrong, and no one ever told me.
Getting awareness to go beyond comfort zone to understand life is the key. You must know your purpose to live a meaningful life. You can never find that meaning in the comfort you live and breath in.
Push yourself every day, and with each push stay consistent to redefine your boundaries. It might not feel much on a daily basis but when you would look back in few months, it is going to be a big positive change.