seconddoorontheright:

One day Buddha was walking through a village. A very angry and rude young man came up and began insulting him. “You have no right teaching others,” he shouted. “You are as stupid as everyone else. You are nothing but a fake.”
 Buddha was not upset by these insults. Instead he asked the young man “Tell me, if you buy a gift for someone, and that person does not take it, to whom does the gift belong?”
 The man was surprised to be asked such a strange question and answered, “It would belong to me, because I bought the gift.”
 The Buddha smiled and said, “That is correct. And it is exactly the same with your anger. If you become angry with me and I do not get insulted, then the anger falls back on you. You are then the only one who becomes unhappy, not me. All you have done is hurt yourself. If you want to stop hurting yourself, you must get rid of your anger and become loving instead. When you hate others, you yourself become unhappy. But when you love others, everyone is happy.”

Promise Yourself

“To be so strong that nothing
can disturb your peace of mind.
To talk health, happiness, and prosperity
to every person you meet.

To make all your friends feel
that there is something in them
To look at the sunny side of everything
and make your optimism come true.

To think only the best, to work only for the best,
and to expect only the best.
To be just as enthusiastic about the success of others
as you are about your own.

To forget the mistakes of the past
and press on to the greater achievements of the future.
To wear a cheerful countenance at all times
and give every living creature you meet a smile.

To give so much time to the improvement of yourself
that you have no time to criticize others.
To be too large for worry, too noble for anger, too strong for fear,
and too happy to permit the presence of trouble.

To think well of yourself and to proclaim this fact to the world,
not in loud words but great deeds.
To live in faith that the whole world is on your side
so long as you are true to the best that is in you.”

— Christian D. Larson, Your Forces and How to Use Them