The Tao's way is to empty when there is too much and to fill when there is not enough. Such is the way.
When mind is too full, it must be emptied. When mind is empty, it will be filled by Tao.
When man and woman are happily full of each other, they keep the emptiness that balance the fullness. When they are unhappily full of each other and wish together to begin again, they must empty.
(I am just a learner and in that rocess presenting the Tao)