The Zohar, Chapter “Lech Lecha (Go Forth),” Item 4: People should observe the work of the Creator. After all, all the people do not know and do not consider what the world stands on and what they themselves stand on.
What does the world rest on? It rests on desire. What are people grounded in? They are grounded in desire. The Zohar is speaking of the types of desires the world and we rest on and how we can change these desires. After all, everything that happens within our desire makes up the reality that we experience.
Our perception of the world hinges on how we change our desires. In his article, "The Creator’s Concealment and Revelation," Baal HaSulam writes that nothing changes outside of us. And it is solely our responsibility to replace our perception of this world with the perception of the World of Infinity.
From the 2nd part of the Daily Kabbalah Lesson 7/12/10, The Zohar