At the end of each yoga class most teachers bring their hands together in front of the heart, bow their head and say "Namaste" and the students bring their hands together and respond in kind. Have you ever wondered exactly what Namaste means? A good definition of Namaste would be "I bow to your true self". The true self might be seen as the deeper, more essential you, less connected to ego, social expectations and pretensions. So the exchange of Namaste at the end of class is a wonderful way to honor the true self in each of us, and recognize that all life is interrelated. For a more in depth explanation take a look at this piece in Wikipedia or a shorter piece in Yoga Journal.