Where is the center of the universe?
It's the same place where all the power is, all the joy, love and most importantly the awareness and the truth.
It's you baby
right now! 
You exist right now, right here and no where else. That's why no future, past or other person is as important as you. 6 billion other humans on the planet, but there is only one you. That is so defining, so powerful and pretty darn scary sometimes too
Do you love someone? When that person is in your present moment awareness, the connection is so strong right? The love is amazing right? That's because they are with you at the center of the universe, the center of all things, your present moment awareness (PMA) actually defines how special every moment is, because it's the center of everything.
When that loved one is not with you, you still love them, but not like when they are with you, because you get to share your PMA, the center of the universe with them.
Even if you're alone in a forrest, that's the center of the universe. In a huge crowd at the football game, surrounded by 50,000 humans, the center of the universe is right there in you, no one else, no where else.
PMA is the most important thing there is, how you think in the moment, how you feel in the moment, affects the moment. Everything revolves around your PMA and is created by your beliefs that exist in the PMA.
Over the years I've spent a lot of time regreting the past, fearing the future and neglecting my PMA and not accepting that I'm the center of the universe.That may sound selfish, because it is, but not in an ego way, but in a truth way, in an acceptance of true self way.
Nothing is more important than you, you are all that matters, but you only ever exist in your present moment awareness, so put all your love and desires there and they will grow there.
That's all you can do and all you have to do. Nothing else matters.
HTH
Jeff