10. Seeing the Bright Side of Life
People who are mentally strong learn to share other people's happiness and good fortune, because they see the bright side of life.
They can celebrate other people's successes without an attack of the green-eyed monster.
The people in your life, friends and family, colleagues even, have dreams and ambitions too and you should learn to share their happiness.
It will make you a better person and you'll feel more fulfilled, happier and enjoy a more peaceful life.
Let their successes inspire you to achieve your own goals, and allow their determination to rub off on you to give you strength, and push you towards achieving your own ambitions.