To achieve

the highest levels of life,

one must continually combine

new levels of yin

and yang.

In nature,

the male energy can

be found in such sources as

the sun and the mountains, and the

female in such sources as the earth,

the moon, and the lakes. Those who

study these things, which are only

hinted at here, will benefit

immeasurably.

Because higher and higher unions

of yin and yang are necessary for

the conception of higher life, some

students may be instructed in the art

of dual cultivation, in which yin and

yang are directly integrated in the

tai chi of sexual intercourse.

If the student

is not genuinely virtuous

and the instruction not that of a true

master, dual cultivation can have

a destructive effect.

If genuine

virtue and true mastery

come together, however, the practice

can bring about a profound balancing

of the student's gross and

subtle energies.