Choosing to always show kindness is a life-long challenge. It takes a lot of practice and maturity to be able to set aside your initial reaction and choose to show kindness instead. Eventually, kindness WILL be your initial reaction. Isn't that the goal anyway?
There seems to be a lot of negativity around us, but you never need to look far to find kindness around you. As teachers, we need to focus on that kindness, highlight it, and encourage more of it. In the classroom, it is important to hold your class to a high standard of kindness.