What Is Empathy?
Empathy is the ability to emotionally understand what other people feel, see things from their point of view, and imagine yourself in their place. Essentially, it is putting yourself in someone else's position and feeling what they must be feeling.
When you see another person suffering, you might be able to instantly envision yourself in the other person's place and feel sympathy for what they are going through.
While people are generally pretty well-attuned to their own feelings and emotions, getting into someone else's head can be a bit more difficult. The ability to feel empathy allows people to "walk a mile in another's shoes," so to speak. It permits people to understand the emotions that others are feeling.
For many, seeing another person in pain and responding with indifference or even outright hostility seems utterly incomprehensible. But the fact that some people do respond in such a way clearly demonstrates that empathy is not necessarily a universal response to the suffering of others.