Chapter - 3 Vibhuti-Pada
In this pada Patanjali speaks of the properties of yoga and the art of integration (smhyama) through concentration, meditation and profound absorption.
Verse 3.1
देशबन्धः चित्तस्य धारणा ॥१॥
deśa-bandhaḥ cittasya dhāraṇā ॥1॥
Fixing the Mind on one point or region is concentration (dharana)
Verse 3.2
तत्र प्रत्ययैकतानता ध्यानम् ॥२॥
tatra pratyaya-ikatānatā dhyānam ॥2॥
A steady, continuous flow of attention directed towards the same point or region is meditation (dhyana)
Dharana means focus of attention. Focusing the attention on a chosen point or area, within or outside the body, is concentration. By it the functions of the mind are controlled and brought to one point.
Once mastery of the five stages of yoga from yama to pratyahara is achieved, the art of focusing the mind and consciousness is undertaken.
Dharana is established when the mind learns to remain steady on its own, or hold on to an unmoving object.
Through the practice of yama and niyama, the sadhaka develops emotional stability.
Through asana, he keeps his body, the abode of the soul, free from disease.
In pranamaya, he learns to stop the dissipation of energy by regulating its flow for proper distribution throughout his body and mind.
Through pratyahara, he develops willpower, detaches himself from the organs of senses and acquires clarity of thought.
This is the beginning of culturing the mind. Once he has become indifferent to worldly matters, he is fit to proceed on the inner quest, enriching the mind through dharana.
Dhyana and samadhi lead the mind on the innermost quest
(antaratma sadhana) , to the self itself.
The mind tries to think of one object, to hold itself to one particular spot, as the top of the head, the heart, etc., and if the mind succeeds in receiving the sensations only through that part of the body, and through no other part, that would be Dharana.
When the mind succeeds in keeping itself in that state for some time it is called Dhyana (meditation).
Dhyana.
Dhyana is a state of absence of mind. Beyond mind stage is Dhyana.
No sensations. No thoughts. What's left is mind has completely become absorbed in mindless state. This stage is Dhyan which is our natural state.
PATANJALI YOGA SUTRAS