The harder we try to catch hold of the moment, to seize a pleasant sensation..., the more elusive it becomes... It is like trying to clutch water in one's hands - the harder one grips, the faster it slips through one's fingers.
With five feeble senses we pretend to comprehend the boundlessly complex cosmos, yet other beings with wider, stronger, or different range of senses might not only see very differently the things we see, but might see and study whole worlds of matter, energy, and life which lie close at hand yet can never be detected with the senses we have.