your Physical Health along with Mental Health via YOGA

Most of us think that Physical Health is important. But if we lack Mental Health(by tensions and other reasons), will we be healthy?
YOGA gives Physical fitness as well as Mental fitness.
Most of the Teachers tell about Aasana's and other physical excercises. But YOGA is not only Physical, it should take us into deeper levels of our strength.
To know the secrets and best Yoga Practice perfectly,