A paradigm shift: when you entire worldview changes. When something reaches into your mind and bends the part of your brain that had decided this was how you were going to live your life. You came across something that makes you think. It's impossible to get out of your head and all of the sudden you realize that you are not who you were before; that your life is not going in the direction you wanted it to, but you're okay with that. In fact, you find yourself preferring this new way of looking at life. You realize that the way life was for you before just never felt as right as this does.
A paradigm shift: when your entire plan for life changes.
And you don't even try to touch the rose colored glasses.