I'm an atheist, but the book of genesis put it very well on this subject. There is one emotion that is unique to humans. It is not compassion, or sense of justice or fairness, aninals have those. It is shame. Which is unique to humans.

On a related note, I heard some interesting theory by Robin Hanson on Lex Fridman's podcast. The guy said that the ego is our brain's attempt at forming a story around the brain's decisions (which are made pre-thought). It's crazy to consider that what we are is just our brain attempt at storytelling to justify ourselves.