professional

what exemplifies being professional?

there seems to be a fuzzy line sometimes where professional melts into fake. where you know / think you need to act a certain way because of a job's demands when you really want to let lose.

are tears professional?
is it your business to stand up to a boss that's partially in the wrong when you're not involved nor in touch with all that has occurred?

is ignoring tears professional?
is a smiling boss the next day professional?
or fake? what about yelling? screaming? recurring vocalizations of frustrations long since built.

i'm not sure where human need to express emotion should end and professionalism should begin sometimes... i'm inclined though to repress it all at times.