What are the Gunas?
All of creation or Prakriti begins with a desire "to be". This desire is called Rajo Guna. The object of that desired result (to be) is called Tamo Guna. The process of becoming is the space of existence itself called Sattva Guna. AUM is the gunas in their causal state--the field of all possibilities and all probabilities. Creation happens when Rajo Guna leaves the state of equilibrium, and becomes a specific probability separate in relation to the AUM.
This interplay of Gunas is called Lila, the divine "dance" of existence.