Mono No Aware

Mono no aware (物の哀れ), lit. 'the pathos of things', and also translated as 'an empathy toward things', or 'a sensitivity to ephemera', is a Japanese idiom for the awareness of impermanence (無常, mujō), or transience of things, and both a transient gentle sadness (or wistfulness) at their passing as well as a longer, deeper gentle sadness about this state being the reality of life.