The Dalai Lama. Heart Sutra: Teachings on Prajnaparamita (№ 465160)

If we carefully consider the feelings of intense lust or anger, we can see that the root of these experiences lies in our partial attitude towards the object towards which they are directed. And if we continue this consideration at a deeper level, we will find that at the core of all this is our passionate attachment to our sense of self, or our ego.