 What we have is not time. What we have is the limitation of perception. When we're looking with our eyes, it's as if we're looking out the window of a fast-moving train. And everything that blurs past the window we see, but in a moment it's gone. And just because a train passes by a tree and you can momentarily see it, but then you can't see it anymore, it doesn't mean that the tree doesn't still exist.