Why is emptiness the essence of Buddhadharma? Because all buddhas and bodhisattvas have but one goal in mind, that is, to help sentient beings attain liberation. How can this be achieved? We cannot resolve the question of birth, aging, illness, and death, or obtain liberation by way of clairvoyant powers, etc. There is only one root cause of cyclic existence and only one method that can eliminate it. The root cause of cyclic existence is ignorance. All afflictions such as greed, anger, and delusion stem from ignorance or from self- attachment which arises from ignorance.

~Depicted from THE FOUR SEALS OF DHARMA - All Phenomena Lack Self-Existence