The Three Powers of the Cosmos

There are three powers of the cosmos to which all things are subject—creation, preservation and destruction; whatever is created lasts for a time, then begins to crumble down. The taking away of the power of destruction implies a creation that will not be destroyed but last and develop always. In the Ignorance destruction is necessary for progress—in the Knowledge, the Truth-creation, the law is that of a constant unfolding without any Pralaya.

Ref:Letters on Yoga – I