Maya means energy. Maya means the energy of God. And Maya is categorized, sometimes in two ways: categorized as Maha-Maya, and Yoga-Maya. It's the same energy. This whole material world is God's energy. All the manifestations within this energy are under the influence of time, therefore, they're temporary. And they're under the influence of the three modes of nature: goodness, passion, ignorance. The spiritual energy, everything is sac-cid-Änanda, eternal, full of knowledge and full of bliss. But it's actually, what is the difference between these energies? Srila Prabhupada, and our acharyas explained, It's really on the basis of our perception.