Pfizer chief executive Albert Bourla urged Babson College graduates on Saturday to set ambitious goals, invoking a famous philosopher from his native Greece and citing his own firm's development of the first coronavirus vaccine cleared in the United States. "Perhaps the greatest philosopher of all time ― and as a proud Greek, of course, I would say that he's Aristotle ― once said, 'Our problem is not that we aim too high and miss. Our problem is that we aim too low and hit,''' Bourla told recipients of graduate degrees at the virtual commencement ceremony.