You can still get your point across when you speak calmly and politely. The way you say things makes all the difference. There is never a need to make a negative situation any worse than...

Don’t allow your negative situations discourage you from what you can become in the future. There is more abilities left in you than you could ever possibly imagine.

It is not one’s negative situation that causes stress in one’s life; rather, it is one’s frequent negative interpretation of it that has the power to do so.