prince rogers nelson
 
The first
 integration of yin and yang
 is the union of seed and egg within the womb.
 The second integration of yin and yang is the sexual union 
of the mature male and female. Both of these are 
concerned with flesh and blood, and all
 that is conceived in this realm must
one day disintegrate 
and pass 
away.
 
It is only
 the third integration 
which gives birth to something immortal.
 In this integration, a highly evolved individual joins 
the subtle inner energies of yin and yang under the light of spiritual
 understanding. Through the practices of the Integral Way he refines his 
gross, heavy energy into something ethereal and light. This divine 
light has the capability of penetrating into the mighty 
ocean of spiritual energy and complete 
wisdom that is 
the Tao.
 
The new life
 created by the final integration
 is self-aware yet without ego, capable of
 inhabiting  a body yet not attached to it, and guided 
by wisdom rather than emotion. Whole
and virtuous, it can 
never die.
 
from Hua hu Ching, Chapter 66