Lama Yeshe, Becoming Vajrasattva: the Tantric Path of Purification

 If you have a completely positive attitude about yourself and touch the pure nature of your fundamental reality, your negative projections disappear, and the world improves. Your environment becomes positive, more beautiful, and attractive. So instead of projecting a dangerous world beset by pollution, radiation, and poisoned resources, you project an incredibly beautiful landscape of trees and water and gentle human beings all helping one another, which gives you great pleasure. If you can interpret the world in that way, it will really become a pure land for you.