ध्यानम्

गङ्गाप्रवाहवत् तैलधारावद्वा अविच्छिन्नरुपेण ध्वेयवस्तुनि चित्तस्य संयोगः स्थिरो भावः ध्यानम् । धारणा विच्छिन्नरुपेण विभिन्नेषु देशेषु भवति, ध्यानन्तु अविच्छिन्नरुपेण भवति ।

योगशास्त्रस्य प्रणेता पतञ्जलिः

तत्र प्रत्ययैकतानता ध्यानम् । (यो. द. ३/२)

ध्यानं-ध्येयज्ञानस्य कस्मिन्नपि स्थानविशेषे प्रावाहिकरुपेण अवस्थानं ध्यानम् उच्यते ।

बाह्यसम्पर्कतन्तुः

• Yoga system of Patanjali (including commentaries Yoga-bhāshya by Vyasa and, Tattva-vāicāradī by Vāchaspati-Miçra), translated by James Haughton Woods, at books.google.com
• The Yoga Aphorisms of Patañjali (including commentary by Bhoja Raja), translated by Rajendralala Mitra, at books.google.com
• Patanjali - Yoga-Sutra: A word by word translation with gramma and comment
• The Yoga Sutras of Patanjali, translation by BonGiovanni, at sacred-texts.com
• The Yoga Sutras of Patanjali: the Book of the Spiritual Man by Patañjali, an interpretation by Charles Johnston, at Project Gutenberg
• Yoga sutra and related yoga texts, at sanskritdocuments.org
• Audio lectures on Yoga Sutras, by Swami Harshananda, at archive.org
• Complete Lectures on Yoga Shastra of Patanjali Maharishi with Vyasa Bhashya at ShastraNethralaya Archived २०१५-०५-०८ at the Wayback Machine