Lama Yeshe: When you contemplate your own consciousness with intense awareness, leaving aside all thoughts of good and bad, you are automatically led to the experience of non-duality. How is this possible? Think of it like this: the clean clear blue sky is like consciousness, while the smoke and pollution pumped into the sky are like the unnatural, artificial concepts manufactured by ego-grasping ignorance. Now, even though we say the pollutants are contaminating the atmosphere, the sky itself never really becomes contaminated by the pollution. The sky and the pollution each retain their own characteristic nature. In other words, on a fundamental level the sky remains unaffected no matter how much toxic energy enters it. The proof of this is that when conditions change, the sky can become clear once again. In the same way, no matter how many problems maybe created by artificial ego concepts, they never affect the clean clear nature of our consciousness itself. From the relative point of view, our consciousness remains pure because its clear nature never becomes mixed with the nature of confusion.