To be spontaneous means to be responsible to the present. People are dominated by the past. Life goes on changing every moment and mind remains clinging to the past.
There is a gap between the mind and life. Anything that comes out of the mind is never going to be a real response; it is only a reaction. And it always falls short: it can’t reach the target, it goes either above or below it. The target is the present, and the arrow is directed by the past that knows nothing of the future, knows nothing of the present.
To be spontaneous means to live moment to moment, to respond to that which is, with no prejudices with no mind, with no past, no future, with no time at all. Then suddenly there is a meeting— a meeting between you and existence. That meeting is bliss, that meeting is God.