The word yoga literally means "union" or "to merge". More than a set of
physical postures or exercises, Sadhguru defines yoga as a science to
determine the nature of who you are and what you want to be.
As you sit here, your idea and your sense and experience of who you are
is very strong. You are here as an individual. But what the trees are
exhaling right now, you are inhaling; what you are exhaling, the trees
are inhaling. In other words, one half of your lung is hanging out
there. This is not just in terms of breath. Today, modern physics is
proving to you that as you sit here, every subatomic particle in your
body is in constant transaction with everything else in the existence.
If this transaction stops, you will cease to exist. So, Yoga means to
know the union of existence by experience.