I have been reminded a number of times recently of the truth in C.S. Lewis’ words:

“What you see and what you hear depends a great deal on where you are standing. It also depends on what sort of person you are.” 
from The Magician’s Nephew

In my garden, this sundial is not only a visual reminder of the passing hours each day, but of time past, time present, time future.  If I stand looking back too long I see only that which is no longer mine to use.  If I look only forward, waiting for tomorrow, I fail to see that when it comes, it will be today.  Standing in the present, I take joy in now.  Where I stand really does change what I see and celebrate.