Samkhya-Yoga-Kundalini
The niyamas are:
Śaucāt-sva-aṅga-jugupsā parair-asaṁsargaḥ
Through cleansing, [the yogi develops] aversion to his own body [and the desire for] non-association with others.
Cleansing or purification, which can be understood as the process of eliminating undesired traits, has two results.
Sattva-śuddhi-saumanasya-aikagrya-indriya-jaya-atma-darśana-yogyatvāni ca
[Through] purity of sattva, [the yogi gains] a calm mind, and the ability to concentrate, to subdue the impulses of the mind and body, and to know the self.
Sattva requires explanation. In the world view that was common when the Sutras were written, it is one of the three guna or qualities that exist throughout material nature:
The guna are said to combine in different proportions to produce the various forms of nature. It may be helpful to think of sattva and tamas as opposite ends of a spectrum, such as good and evil or light and darkness. The activity of rajas can be influenced by sattva or tamas.
In the current context, the harmful impulses, thoughts, and actions related to lust, anger, and greed are tamas. The yogi needs to adjust his thoughts and control his impulses toward the sattva end of the spectrum. When he does that he starts to realize the benefits of:
These read like the steps of a ladder that the yogi is climbing. Note: sattva can never be completely pure. The three guna are said to be inseparable, and all three are always present to some degree.
Santoṣad-anuttama-sukha-lābhaḥ
Through contentment, [he gains] unsurpassed happiness.
Contentment seems like a synonym for greedlessness, except that it is a positive state of mind rather than restraint of a harmful impulse.
Kāya-indriya-siddhir-aśuddhi-kṣaya-attapasaḥ
From austerity, [results] perfection of the body and the senses and the diminishing of undesired traits.
Examples of austerity include celibacy, simmple diet, modest clothing, performing asanas and other yoga practices. Modern yoga doesn’t usually consider performing asanas to be an austerity, but the inclusion of “perfection of the body” strongly suggests that yoga practices should be included.
Svādhyayād-iṣṭa-devatā-samprayogaḥ
From chanting of mantras, contact with the desired deity.
Svadhyaya has a few different meanings. It is sometimes translated as self-study, and people derive all sorts of meaning from that. Svadhyaya can also refer to the ancient practice of memorizing and reciting scriptures for the purpose of transmitting them to others. Here, svadhyaya refers to the chanting of mantras that are associated with specific deities. This type of practice is common in Buddhism and Hinduism but is usually omitted by western yoga practitioners. Compared to Isvara, the ista-devata are lesser deities.
Samādhi-siddhir-īśvara-praṇidhānāt
From Isvara-pranidhana, accomplishment of samadhi.
The explanation of Isvara and Isvara-pranidhana is given in Yoga Sutras chapter one, and is presented here in abbreviated form.
Īśvara-praṇidhānād-vā
In Sutra 1.23 Isvara-pranidhana is introduced with the word va, meaning “or”. This implies that isvara-pranidhana is being offered as an alternative to the more detailed methods of samadhi described in the Jnana portion of the Sutras.
The sutras go on to describe some characteristics of Isvara:
Patanjali has described isvara-pranidhana as repetition of the syllable “Om” and contemplation of its meaning.
There is some disagreement among translators regarding the first phrase. Here it is taken to mean changing the consciousness, which is usually directed outward, and directing it inward. The second phrase tells us that, along the way to attaining samadhi, isvara-pranidhana helps the yogi to overcome obstacles that may be in his/her path.
The subject of Isvara is deep and wide. It is often interpreted as referring to Saguna Brahman, the universal unity that is central to Advaita Vedanta, which is the dominant philosophy of Hinduism. The Samkhya-Yoga tradition, of which the Yoga Sutras is a part, describes a different type of Isvara. If the reader is not comfortable with Patanjali’s concept of Isvara, it is acceptable to substitute his/her own concept of God. Isvara will be discussed at length elsewhere.