In this teaching on the wisdom chapter of Shantideva’s The Way of the Budhisattva, His Holiness the Dalai Lama dismantles the belief in self by examining the nature of body, feelings, mind and phenomena.
In The Way of the Bodhisattva (Bodhicaryavatara), Shantideva’s presentation of the identitylessness, or selflessness, of phenomena is explained first by means of the four mindfulnesses—mindfulness of the body, of feelings, of mind and of phenomena.
So, according to Shantideva’s text, first we reflect upon the nature of our own body. This is done by contemplating the body’s general and specific characteristics, for example, the aging process and the impure substances that constitute bodily existence. Generally speaking, meditating on the mindfulness of body, reflecting upon the nature of our own body, is the approach explained in the Hinayana scriptures. However, we can extend this contemplation to the nature of the body, feelings, mind and phenomena of all beings, who are limitless like space. Then it becomes a training of the mind according to the Mahayana path. When we contemplate the emptiness of these four factors—body, feelings, mind and phenomena—we are practicing a mindfulness meditation focused on the ultimate truth.