Yep, I've been contemplating how to say what I say in this video for a whole year.
It's a tricky topic to approach because you simply can't get around the fact that you don't know exactly what other people are going through. You will never know everything about the people you rehearse with everyday. It's also impossible to change and control their thoughts and actions. You can only control yourself.
Which, of course, led me to the uncomfortable topic of how to address this need for self-reflection. We're all guilty of thinking terrible thoughts from time to time, and if we don't take the time to confront ourselves, we'll end up saying and doing a lot of things that can (and probably will be) construed as hurtful, mean, and arrogant to our fellow musicians, though we never meant any of it.
No one (well, there may be a few exceptions) is completely bad. No one is completely good either. If we can see each other in this light, it will make for much better communication, which, in turn, will translate into how well we play music together.