If we don’t hold the belief that we are “Good Enough” to be here now, we have no choice but to live in the past and future. But to live in the past and future means to miss whatever happens now.
You belong here. You have been, are, and will always be up to the experience of your own life. Don’t let concepts and idea’s take the place of your experience.
You are the only one of you that will ever exist, celebrate that and live it to the most you can possibly live.