CC 1.14.33

If one is taught from the beginning of life the Vaiṣṇava philosophy of duality or variety, the monistic philosophy will not very much bother him. In reality, everything is an emanation from the supreme source (janmādy asya yataḥ). The original energy is exhibited in varieties, exactly like the sunshine, the original energy emanating from the sun, which acts as light and heat in variety. One cannot say that light is heat and heat is light, yet one cannot separate one from the other. Therefore Lord Caitanya Mahāprabhu's philosophy is acintya-bhedābheda, inconceivable nonseparation and distinction. Although there is an affinity between the two physical manifestations light and heat, there is a difference between them. Similarly, although the whole cosmic manifestation is the Lord's energy, the energy is nevertheless exhibited in varieties of manifestations.