The Two Greatest Delusions

From the point of view of Mahayana Buddhism, this is the greatest of all delusions, the belief that something exists. Upon close analysis, nothing exists by itself. Any given entity can only be defined in terms of other entities in time, space, or mind. And these in turn can only be defined in terms of other entities, and so on ad infinitum.

According to Mahayana Buddhism, this is the second greatest of all delusions, the belief that nothing exists. Emptiness does not mean nothingness. It simply means the absence of the erroneous distinctions that divide one entity from another, one being from another being, one thought from another thought. Emptiness is not nothing, it's everything, everything at once. This is what Avalokiteshvara sees.

Red Pine, in his commentary on the Heart Sutra entitled The Heart Sutra