Mastery of Oneself. The name says it all. Often times, people are not the master of themselves. As the Stoic philosopher Epictetus said "No man is free who is not master of himself". This applies more than ever in the modern day. It's about being the master of your own mind. Having full control over your life and being present. Loving and giving to your close ones, nature, the world itself. Learn to appreciate what's around you. Realize that life is temporary. It's nothing more than a gift. A gift that you should be grateful for, and fulfill it.