A Gentleman will Dress as One.
He is obedient to his company.
The tuxedo does not make a Gentleman. A Gentleman is not a peacock intent on flashing the greatest degree of his dapper plummage but is a man who cares to ask himself, "What would my company expect and benefit from?" If working on a transmission, a Gentleman wears coveralls. If the hostess says semi-formal he will eschew the temptation to prove he can be better than she asks. And since he is in service to others, he will seek to meet each moment with a studied understanding. He must care for each society he enters and not be only on the mark when the moment calls for that which he enjoys, be it high or low. A blue collar laborer can, in this regard, be a Gentleman if he studies his obligations to the dress higher than his normal life and is able to achieve it when called upon. Conversely, if you can't wear the coverall as convincingly as you wear the tuxedo then you are no Gentleman, you are an eccentric. That which can honestly claim to be high will be able to accomplish sufficiently all that is below. A Gentleman is Better, not merely Different.