" Don’t focus on the weeds. You may be spending all your time, so to speak, trying to pull up the weeds. In other words, trying to fix everything in your life, trying to make people do what’s right, trying to straighten out all your co-workers.
You can’t change people. Only God can. If somebody wants to be a weed, no matter what you do, they will be a weed. Spending all your time and energy trying to change them will keep you from blooming. One of the best things you can do is just bloom bigger than ever right in the middle of those weeds. Right in the middle of those negative and critical co-workers, put a big smile on your face.
Be kind. Be friendly. When they complain, don’t preach a sermon to them. Don’t try to stop them. Your job is not to pull the weeds. Your job is to bloom. Just have a good report. The more they complain, the more grateful you should be. The more they talk defeat, the more you should talk victory.
If your co-workers come in one morning being sour and rude to you, don’t be offended and think, Well, I’m never speaking to them again. That’s the time more than ever to bloom. Put a smile on your face anyway. Have a good attitude in spite of that. "

― Joel Osteen , Every Day a Friday: How to Be Happier 7 Days a Week