This may be stated poorly but it’s true:

mohandasgandhi:

You’re only as kind as how you treat those who you treat the worst.

Just be nice.

And people are doing the best that they can with what have.

So, if you catch yourself not being nice, forgive it and be nice.  You were doing your best, and now your best is to be aware of your shittery. 

Shittery shall not be shitted least the shit shits on your shit.