“When you find it difficult to stop your mind while you are sitting and when you are still trying to stop your mind, this is the stage of “form is emptiness and emptiness is form.”  But while you are practicing in this dualistic way, more and more you will have oneness with your goal.  And when your practice becomes effortless, you can stop your mind.  This is the stage of “form is form and emptiness is emptiness.”  Here there is no dualism.”
 
– Shunryu Suzuki – Zen Mind, Beginner’s Mind.