Yoga Sámkhya (in the beginning, when there was only one yoga – the Yoga – it was called Sámkhya) uses all the 13 Technical Disciplines, performed in each class - the Mahá Sádhaná / Great Practice. All of these prepare the last one, and the most important one: Dhyána/Samádhi – Real Meditation. There is no Real Meditation outside Yoga – according to the Great Master Patañjali.