This definition involves two central dimensions of compassion. The first is known as the psychology of engagement and involves sensitivity to and awareness of the presence of suffering and its causes.
Clifford C. Cliff Clavin, Jr. (born 1947 or 1949), is a fictional character on the American television show Cheers co-created (and played) by John Ratzenberger. A postal worker, he is the bar's know-it-all and was a contestant on the game show Jeopardy!
Two years before he began his decade-plus run as Boston mailman/trivia expert Cliff Clavin on Cheers, and a full 15 years before he began voicing Hamm in the Toy Story series, John Ratzenberger made an early-career appearance as Major Bren Derlin, part of the Rebel Force in The Empire Strikes Back.