How to remain free from the hurt and sickness of others?

The following excerpt is from a samvaad (dialogue) session with Acharya Prashant.

Question (Q): Dear Acharya Ji, you have said that what is healthy is forgotten, what is sick is remembered. If something is bothering me and making me restless, is it always that I am sick? Can there also be a way where I am healthy but the sickness of the other person is bothering me…