Think on your feet.
Good impulses spring from a happy readiness of spirit. For such a spirit there are no tight spots, no troubling chance occurrences, only vivacity and brio. Some think much, and then do everything wrong, and others get everything right without any forethought at all. Some people have reserves of antiperistatis [opposition by which the quality opposed acquires strength]. Difficulties bring out the best in them. They are monsters who succeed spontaneously and err whenever they have thought about something. What doesn't occur to them immediately will never occur to them, and there is no use thinking about later. Quickness wins applause, for it reveals prodigious talent : subtlety in thought, prudence in deeds