Many of us attend a few yoga classes and find that we like the glimpse of another way of life that yoga offers. We are delighted by the way we feel after class and we are pleasantly surprised as certain behaviors start to fall away. Perhaps we no longer need coffee in the morning; or staying out late at night becomes less attractive; or we find ourselves calmer and more compassionate. Suddenly we're convinced that we've hit upon a painless way to solve all our problems. Sadly, this is not the case. Practice is not a substitute for the difficult work of renunciation. The postures and breath work that you do in a typical yoga class will change your life. These practices—asana and pranayama—suffuse us with the energy we need to take on the hard choices and to endure the inevitable highs and lows. What yoga practice will not do, however, is take the place of the hard lessons each of us has to learn in order to mature spiritually.