In Leviathan Hobbes said that what we call the ‘deliberation’ of the will is nothing but ‘the last appetite, or aversion, immediately adhering to’ an action. Whatever the general truth of the analysis, Trump’s process of thought works like that. If Obama often seemed an image of deliberation without appetite, Trump has always been the reverse. For him, there is no time to linger: from the first thought to the first motion is a matter of seconds; the last aversion or appetite triggers the jump to the deed.
—David Bromwich, “Act One, Scene One,” London Review of Books (16 February 2017)
Indeed this was ever Loki’s way, for he took such a delight in mischief that he would often do whatever came into his head, without counting the cost.
—Roger Lancelyn Green, Myths of the Norsemen (1960)