Old ways of thinking have not served you so break out of that comfort zone and try something new.
It could be today that new ways of thinking and new avenues of thought are scaring you a little. It's easier to stay in your comfort zone, but perhaps your comfort zone has not been bringing you results. Take a look at what's been going on and make sure you do not fall back into old ways of doing things and immature thinking, it's time to move on from this.