Definitions: (1) acting playfully or creatively upon a sudden impulse; (2) not premeditated; not contrived or manipulated; natural; (3) done or resulting from one’s own desire
Too Far: capricious
Saying: Carpe diem (Latin): “Seize the day.”
Quote: Once we believe in ourselves, we can risk curiosity, wonder, spontaneous delight, or any experience that reveals the human spirit. — Edward Estlin [e. e.] Cummings (1894-1962) American Poet
Comment: Each quality has a default level. But you can change that level by being open to it when it comes up in your life. Consciously supporting it enhances it.
Observation: Automatic versus Spontaneous
Your automatic reactions are put into play immediately without thought. They could be very complex responses or as simple as flight, fight, or freeze. Your habitual reactions have been created genetically over many generations. You can and have modified them somewhat by your conscious actions.
A spontaneous response could, at the least, be the same as an automatic response. But it also could be much more flexible. As you add a wider range of possible options, you extend your responsiveness.