If body and mind are united as one, life will be joyful. What is most important to every human being is the ability to unite the body and mind as one. This will be the greatest thing.
The Lord Buddha, the Paccekabuddha (an individual who independently achieves liberation without the aid of teachers or guides and without teaching others to do the same), and the Arahants all united their bodies and minds in attaining enlightenment. When the body and mind are united as one, you will be astonished.
What is most important to every human being can be found in the middle of the body, not outside. The core of everything is in the middle. For example, the heartwood is in the middle of trees. The rest is just bark and sapwood. The essence of life is in the middle of human bodies.
"The essence of life in the middle of the body can be found when the mind is still. To reach the essence of life in the middle of the body, the mind must be at ease."
Let the mind stop and be still comfortably. When the body is comfortable and the mind is at ease, the essence of life in the middle of the body can be reached. Each person has what is most important within them.