Summarize this article in one sentence.
Recognize that you don't know everything. Be honest about your faults and weaknesses. Don't obsess over your reputation, or take serious offense over what people who do not know you well think of you. While you shouldn't allow people to walk all over you or verbally abuse you to your face, you should understand that people often say things which are stupid and untrue. Recognizing that the people who say hurtful things about you or those you care for have problems which you did not cause can bring an inner peace and contentment. If you've hurt someone, or lashed out in anger, apologize. Say, "I am sorry for hurting you, can you please forgive me?" Do not constantly look for the perfect partner or job with which to make you happy. These things can bring happiness, but being truly content requires that your contentment is not linked exclusively or primarily to them. If you lose the job or partner that you love, find something new to bring contentment. Remember that there are many jobs and many people who can make you happy. Instead of worrying about what you deserve, or what others should do for you, learn to be thankful for what you have. If your parents give your brother a big vacation for his birthday and they give you only a night out at the movies, don't hold a grudge against either your brother or your parents. Instead, be thankful you had the night out. Don't obsess over what you did or didn't get. Doing so will reduce your overall contentment. Explore why you feel entitled to more than you're receiving. Do you feel snubbed? Do you think you're better than the person who received more than you did? Look for the upside to your jealousy. For instance, imagine you are jealous of a friend who was asked to donate to a good cause when you weren't. You might be jealous of the person who was asked. But upon reflection you might realize you were jealous because you wanted to donate to a good cause as well. This means your heart's in the right place.
Be humble. Do not make happiness contingent on something or someone else. Don't be jealous.