From the Radiant Rider-Waite Tarot, the Four of Cups:
Crossed arms, averted eyes and a sullen expression - here is the body language of emotional hollowness. Yesterday I was a whirlwind, completely and intensely focused on a creative project. I worked all day and into the wee hours of the morning, but now I'm finished for the most part. And as with most exciting adventures, celebrations with friends, and the completion of a project or goal, the end brings an emotional letdown. I love the rush of being creatively inspired, yet I know there is a balance to all things. My body, mind and spirit need time to unwind and relax in order to prepare for the next time my muse makes an appearance.
From the Archetype Cards comes "Monk/Nun:"
When I am extremely busy, the first thing to go is my spiritual practice. Which makes no sense, considering it is what my sanity and serenity depend upon. Yet it also provides more than just these - it helps me refill those cups that are empty, bringing clarity and solutions as well. I doubt there will ever be an equal amount of both activity and contemplative stillness in my life, but running on one without the other will lead to a gauge that reads "empty."