OTTAWA—Supreme Court Justice Clément Gascon is a brave man and a role model, whether he views himself as one or not (I don’t know the man, but somehow I doubt he does). To reveal publicly, as he did a week ago, that the reason for his recent disappearance was due in part to a panic attack epitomized leadership. He refused to hide in the shadows, as that is the paralysis that mental health angst can cause.