Cultivation of Stillness

Here's an excerpt from an esoteric classic of Taoist scripture of which I will remain nameless for absolutely no reason at all, but enjoy:

"During the twelve double-hours of the day,
Constantly seek clarity and stillness.
The numinous tower of the heart emptied of all things:
This is called clarity.
Not allowing even a single thought to arise:
This is called stillness.

The body is the dwelling place of qi.
The heart is the residence of the spirit.
When intent moves, spirit is agitated;
When spirit is agitated, qi is dispersed.

When the intent is stable, spirit remains fixed;
When spirit remains fixed; qi gathers.
The perfect qi of the Five Phases
Then gathers together and forms a pinch of elixir."

It's interesting to find that the esoteric Taoist practice of achieving immortality is in line with the style of qigong I'm currently learning.