We used to have a saying in Boston Brass that we would use all of the time when coaching groups: "Strong and wrong!"
The meaning of that is of course to always play like you mean it, even the mistakes. If you are worried about making a mistake and back off a little, even if you play the note or passage correctly, it is going to sound wrong anyways.
And who really cares if you make a mistake anyways?
(Well, other than your ego...)