If you are kind to yourself it is easier to be kind to others

 There are two ways to learn kindness but both likely will reach the same place.

1. Learn to be kind to yourself so that it becomes a habit to be kind to others.

2. Learn to be kind to others so it will also rub off that you learn to be kind to yourselves too.

All real civilization is built upon kindness towards oneself and all others. Understanding this is the key to longevity if you have the right genes to live that long. So, kindness is the key to understanding civilizations and kindness is also the main key to longevity as well.