" A sculptor decides to make a figure of a horse. The idea of this horse-the form of it which he sees in his imagination-is inspired by sattwa. Now he gets a lump of clay. This clay represents the power of tamas-its formlessness is an obstacle which has to be overcome. Perhaps, also, there is an clement of tamas in the sculptor's own mind. He may think: "This is going to be a lot of trouble. It's too difficult. I'm tired. Why should 1 make the effort?" But here the force of rajas comes to his aid. Rajas, in this instance, represents the sculptor's will to conquer his own lethargy and the difficulties of his medium; it represents, also, the muscular exertion
which he puts forth in order to complete his work. If a sufficient amount of rajas is generated, the obstacle of tamas will be overcome and the ideal form of sattwa will be embodied in a tangible clay object. From this example, it should be obvious that all three gunas are necessary for an act of creation. Sattwa alone would he iust an unrealized idea, rajas without sattwa would be mere undirected energy, rajas without "

― Prabhavananda , How to Know God: The Yoga Aphorisms of Patanjali