Reflect
Take a look in a mirror, but before you do that...
Close your eyes and think nothing. There is nothing now. Existance is non-existant. Think back to the begining of time. Before there were people. Before there was anything. Absolutly nothing!
Now open your eyes and look in the mirror. Look into your own eyes and be amazed that you exist. That of all the people and things that have existed through the course of history, you are the one staring back through the mirror RIGHT NOW! Of all the thoughts being thought right now, you have the pleasure to think that of yourself and to read your own mind like no other person can.
You exist. I exist. We are thinking beings in a large group of thinking beings with everything to ourselves. The mind is anything. As far as you are concerned, it's anything that you want it to be. You are the center of a universe that is the mind, your mind. That is enough to want to keep existing. Existance is a miraculous posession that only your mind can extinguish.
The mystery of my own existance used to shock me all the time. I have suffered with depression and anxiety my whole life. But there were rare moments when my mind suprised me. I would literally find myself looking in the mirror, feeling dizzy, and not believing that it was possible that I existed. I just couldn't believe it. Your prompt reminded me of that feeling once again. This disbelief makes me feel so happy, in a way that I can hardly explain in these words.
Now I remember that there is no need to be sad, when the most beautiful thing to posses is the very thought that I exist.