I normally reply: 'Spontaneously.' However, I seldom position out that essentially natural spontaneity is in Daoist philosophy identified as ziran, which is literally 'self so' or 'so of itself' or 'so on its own'. However, I would say it is superior not to truly feel the will need to act, to keep on being in wuwei until ziran decides it. It is the constructive theory right contrasting the detrimental wuwei.