Our capacity for calm ultimately depends on our levels of expectation: if we suppose that most things normally turn out to be slightly disappointing (but that this is OK); that change occurs slowly (but that life is long); that most people are neither terribly good nor very wicked (and this includes us); that humanity has faced crisis after crisis (yet muddled through) - if we are able to keep these entirely obvious but highly fugitive thoughts alive in our minds, then we stand to be less easily seduced into panic.