These days the world tells us to look out for our own interests. But did you know that putting other people’s interests first has many health benefits? Being kind is actually good for us and not just for the one who benefits from our kindness. Psychology Today lists some of the side effects of being kind and sincere:

1. Acting kindly makes us feel good.
It feels wonderful to do something useful for someone. The “helper's high” is the uplifting feeling that we experience after doing an act of kindness to others. The “helper’s high” shows up in our brain’s reward system. The experience is like consuming a piece of chocolate cake or having a pleasant surprise. It feels so good that the brain motivates us to do them again and again. As the proverb goes, it’s better to give than to receive. It makes you feel like your life is valuable.

2. Kindness is contagious.
Kind acts can have a ripple effect—for example, giving a genuine...