Buddhist-Meditation-Systematic-and-Practical

which are the tummo and the wisdom essence. On top
of the median channel are the white wisdom-drops, or
the great compassion gained through wisdom. The red
drops contain the five elements, particularly that of fire;
while the white ones are mostly water. Through the
combination of these two, the other three elements will
be produced, and the five wisdoms will appear in order
to be worked upon.
Each wisdom-drop contains a Buddha and his pure land.
It may be a great one, such as the Dharmakaya (which
used to be called the "Only-One-Drop"), or else the drop
may contain many different herukas and Buddhas in
Sambhogakaya or Nirmanakaya.
What is the form and color of the wisdom-drops, and
who has seen them? The numerous Tibetan books
contain only a few words on this subject. A
wisdom-drop is round, about the size of a pea, and has
these four characteristics: first, it is round and perfect;
second, clear and transparent; third, bright and clean;
and fourth, merciful and moist.
Machig Labdron, the mother of prajnaparamita,
describes the wisdom-drop thus: "It is egg-shaped, the
size of the tip of the little finger, and smooth like oil; it
has the color of a particular blue gem which comes from
a holy place named 'Bu Da Li'. In the cave of Bu Da Li
there is a hermitage called 'Sang Bu Bai', a triangular
palace of the holy Dharma surrounded with rainbows. It
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