Patanjali Yogasutra Introduction
Part 1 – Samādhi-pāda – Yoga and its Aims
1.1
1.2
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1.5
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1.7
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Part 2 – Sādhana-pāda – Yoga and its Practice
2.1
2.2
2.3
2.4
2.5
2.6
2.7
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Part 3 – Vibhūti-Pāda – Powers
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
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3.11
3.12
3.13
3.14
3.15
3.16
3.17
3.18
3.19
3.20
3.21
3.22
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3.31
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3.33
3.34
3.35
3.36
3.37
3.38
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3.55
3.56
Part 4 – Kaivalya-pāda – Liberation
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
4.16
4.17
4.18
4.19
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4.21
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4.34
Commentary on Sri Patanjali Yogasutra by Swami Vivekananda
How are we to know that the mind has become concentrated? Because the idea of time will vanish. The more time passes unnoticed the more concentrated we are. In common life we see that when we are interested in a book we do not note the time at all; and when we leave the book, we are often surprised to find how many hours have passed. All time will have the tendency to come and stand in the one present. So the definition is given: When the past and present come and stand in one, the mind is said to be concentrated.
Yogasutra – Verse 3.12 – Yogasutra-3.12-tataḥ punaḥ – In Sanskrit with English Transliteration, Translation, Meaning and Commentary by Swami Vivekananda – Yogasutra-3-12