Mono-no aware: the ephemeral nature of beauty – the quietly elated, bittersweet feeling of having been witness to the dazzling circus of life – knowing that none of it can last.
It is the sad beauty of seeing time pass – the aching awareness of impermanence.
Please, appreciate the moment, because the beauty experienced in it will never be the same. It will pass. It will end. That is okay though, because as time moves ever onward new beauty will appear — and we can always return to those wondrous past moments, if only in memories.