I always believed that what we think, what we say is what we are. I've seen words destroy relationships, made others, communicate things beyond their meanings.
This led me to always watch what I'm saying, and maybe try to "over-control" this. I always acknowledge the bad thoughts, the complaints, the little devil's voices in the back on the head, but always make a conscious effort to not voice them out loud. I acknowledge they exist, but since most often I cannot do much about it, I let them go. If I can do something about it, I do my best to tackle this issue and not let it rot. Problem done.
However, people close from me made me realize that I often have no patience when it comes to those thoughts, when others say them out loud. Where I saw complaints and vain criticism, they saw a way to express their frustration, a catharsis to avoid to bottle this up.
Some of those explain that they often think about censoring themselves when I'm around them, the total contrary of what I'm expecting from close friends.
This made me realize that my way of coping with those thoughts is different from most people around me, and my - negative - reaction to theirs often is what I particularly try to avoid.
I feel lucky to have friends open enough to tell it to me. Acknowledging their frustration is another step I haven't been thinking of doing before, instead of just seeing these situations as if I was the one voicing them out.