I was in a rather inconspicuous class, on a rather inconspicuous day, when the Ethics lecturer (a big, burly, ginger haired Family barrister) pulled this up on the slides.
It turned out to be, at the time, one of the most important inspiring things for me to have read on the first day of Bar School:
"But no matter how hopeless the cause, however unmeritorrious the client, notwithstanding the antipathy of the judge, irrespective of the risks to his own reputation, and despite the other pressing concerns which may be preying on on the mind of the lawyer, what counsel must do is to follow and defend the great tradition of advocacy..."
Pannick D, Advocates (1992, p.5)