Yoga is a vast subject. It encompasses the entire dimension of human existence, the body and all of its components as well as the spirit, which is beyond the body.
Yoga is a system that was discovered by the wise rishis and munis thousands of years ago. It was the cultural heritage for the whole of mankind, not only of Indians. However, in India the science of yoga was preserved in spite of the historical accidents and the ravages of time, whereas most cultures, tribes and nations all over the world were unable to preserve their own heritage.
Therefore, yoga is not a Hindu science. It is the science of mankind.
—22 February 1977, Indian Embassy, Kathmandu, Nepal