Taoism says..

Chapter 11, Tao-Te-Ching

A. A wheel is made of thirty perceptible spokes but it turns due to the imperceptible central axis of the hub.
B. Vessels are made of perceptible clay, but it is their imperceptible hollow that is useful.
C. The imperceptible holes that make the doors and windows of a house are its essentials.
D. It is the imperceptible that produces effects and results.

Lao Tzu says it is not the perceptible or the things that can be seen that make a being, but the imperceptible (hollow, void, hole) that cannot be seen that makes the being. He gives the example of the perceptible wheel which has spokes but turns due to its imperceptible central axis, he gives the example of vessels which are made up of perceptible clay but are useful due to their imperceptible hollow. What Taoism wants to put across is that its not the perceptible body of the man but it is the imperceptible soul, feelings and thoughts that make a man who he is. Thats why suffering of the imperceptible is more painful than suffering of the perceptible that is emotional and mental suffering is more painful than physical suffering.
One should realize that there is an immortal soul, your feelings and your thoughts that make you who you are. Pass down your thoughts and whatever you learn from life, for your mortal body may die but your thoughts will remain alive in this world.