We cannot see atoms, yet we are convinced by all sorts of evidence that they exist. But how about slivers? Is there any evidence that they are real?
A sliver - in terms of its physical dimensions - is the size of the universe. That would seem to be sufficient to observe. And yet, according to definition, they do not exist for any measure of time. How then can slivers be thought of as be real?
Gurus and guides of every creed recommends their adherents to 'be here now', to be 'mindful', 'present', and to 'live in the moment'. We are always, at least we ought to be, surfing the crest of the present moment. It is the crux of our being, to live in the here-and-now.
No matter what the clock shows, it's always the present moment. We occupy no other space in time. We can't experience the past; it's gone. And the future never arrives; no sooner is it here than it disappears in its turn. The future morphs instantly into the past.
The present is the current sliver occupied. It carries our consciousness the way that a function carries its derivative. Therefore, all of us experience a sliver's reality, subjectively, as the eternal present.