I usually answer: 'Spontaneously.' However, I not often position out that really pure spontaneity is in Daoist philosophy known 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 come to feel the will need to act, to continue being in wuwei right up until ziran decides it. It is the favourable principle immediately contrasting the adverse wuwei.