Sadhguru: Yoga is Hindu just the way gravity is Christian. Just because the law of gravity was propounded by Isaac Newton, who lived in a Christian culture, does it make gravity Christian? Yoga is a technology. Anybody who is willing to make use of it can make use of it. Why the yogic sciences have gotten labeled as Hindu by a few ignorant people is because this science and technology grew and prospered in this culture, so naturally it has gotten associated with the Hindu way of life. The word "Hindu" has come from the word “Sindhu”, which is a river. Because this culture grew from the banks of the river Sindhu or Indus, this culture got labeled as Hindu. Hindu is not an “ism” – it is not a religion. It is a geographical and cultural identity.