Vitality is important. Yet, approaching yoga wisdom for merely health and longevity is like approaching a millionaire friend and asking for a few cents. The real gift of yoga is far more valuable: the gift of ultimate connection.
Indeed, yoga means to connect. Based on the quintessential yoga handbook, the Bhagavad-Gita, The Perfection of Yoga elaborates on the dynamics of this connection. 
It offers the technology by which we can reconnect to Krishna, the reservoir of all pleasure. Now, who wouldn’t be interested in that?