It (Peace) depends on whether one can become a harmonious being, with mind and body in harmony and unity and one’s original mind at the center. When a person comes to have the heart of God and True Parents, he or she can begin to live fully for the sake of others and consistently lead a life where true love is at the center, a life in which the person can achieve true peace.
Source
P. 446, par. 5
Remark
A distinction may be made here between 2 processes. To unite mind and body and to establish the original mind as its center.