The practice of contemplating the five aggregates as empty: "Perception" for example

From the Heart Sutra, 照见五蕴皆空，渡一切苦厄. Clearly perceived the empty nature of the five skandhas (Form, Feeling, Perception, Mental formation, Consciousness)   And transcended all suffering. 

This "me" is changing constantly".“Perception” means notions, reflections and thoughts. It changes over time and space. Therefore, there is no need to be attached to it. When there is no attachment to impermanence, you let go of suffering.