One of the great insight from Tibetan Buddhism is to point out the circular dependency between consciousness and matter (in the form of bodily subtle energy), and provide ways to decouple this Gordian Knot to reach non-duality. The followings are original teachings from Tilopa. Simplicity is the best form.
(1) Inner Heat Yoga (on energy):
The yogic body, a collection of energy channels,
Coarse and subtle, possessing the energy fields,
Is to be brought under control.
The method begins with the physical exercises.
The vital airs [i.e., energies] are drawn in,
Filled, retained and dissolved.
There are the two side channels,
The central channel avadhuti,
And the four chakras.
Flames rise from the chandali fires at the navel.
A stream of nectar drips down
From the syllable HAM at the crown,
Invoking the four joys.
There are four results, like that similar to the cause,
And six exercises that expand them.
Coarse and subtle, possessing the energy fields,
Is to be brought under control.
The method begins with the physical exercises.
The vital airs [i.e., energies] are drawn in,
Filled, retained and dissolved.
There are the two side channels,
The central channel avadhuti,
And the four chakras.
Flames rise from the chandali fires at the navel.
A stream of nectar drips down
From the syllable HAM at the crown,
Invoking the four joys.
There are four results, like that similar to the cause,
And six exercises that expand them.
This is the instruction of Charyapa.
(2) Six Words of Advice (on mind):
Don’t recall.
Don’t imagine.
Don’t think.
Don’t examine.
Don’t control.
Don’t imagine.
Don’t think.
Don’t examine.
Don’t control.
Rest.
