"The mind has, in general, two aspects, stillness and movement. Sometimes, the mind is quiet and free from thoughts, like a calm pool; this is stillness. Eventually, thoughts are bound to arise in it; this is movement. In truth, however, although in a sense there is a movement of thoughts within the stillness, there is actually no difference between these two states — just as the nature of stillness is voidness, the nature of movement is also voidness. Stillness and movement are merely two names for the one mind."

Dilgo Khyentse Rinpoche