Diamond Sutra
Chapter 5
The Lord Buddha interrogated Subhuti, saying: “What think you? Is it possible that by means of his physical body, the Lord Buddha may be clearly perceived?” Subhuti replied, saying: “No! Honoured of the Worlds! It is impossible that by means of his physical body, the Lord Buddha may be clearly perceived. And why? Because, what the Lord Buddha referred to as a physical body, is in reality not merely a physical body.” Thereupon the Lord Buddha addressed Subhuti, saying: “Every form or quality of phenomena is transient and illusive. When the mind realises that the phenomena of life are not real phenomena, the Lord Buddha may then be clearly perceived.”