We exist in the future; we perceive the past.
I was recently acquainted with this interesting, but fairly simple, idea – that we exist in the future of what we perceive.
To begin: light takes time to travel; one second to cross 299,792,458 metres, to be exact. Now take the stars in the night sky, for example; Proxima Centauri, the closest star to the sun, is approx. 4.2 light-years away. This, of course, means that the light emanating from it takes 4.2 years to reach us here on Earth. We therefore see the star as it was 4.2 years ago.
Light from everything in the universe, including this text which you are reading now, has taken time, no matter how miniscule an amount, to reach your eyes. Say, for example, your monitor is 50cm from your eyes; it has taken the light from said monitor 1.66782048×10-9 seconds to arrive at your retina. You are therefore viewing the monitor as it was 1.66782048×10-9 seconds ago. Every single object you see is merely an image of what that object looked like in the past. This includes your own body.
Conclusion (TL:DR) – Because light takes time to travel, we see everything in the universe for what they were in the past. Our body, therefore, physically exists fractionally further in the future of what we perceive.