From ‘Teachings of the Hindu Mystics’Edited by Andrew Harvey

Health, a light body, freedom from cravings,

A glowing skin, sonorous voice, fragrance

Of  body: these signs indicate progress

In the practice of meditation

-          Shvetashvatara Upanishad

Sri Krishna: You have the right to work, but never to the fruit of work. You should never engage in action for the sake of reward, nor should you long for inaction. Perform work in this world, Arjuna, as a man established within himself – without selfish attachments, and alike in success and defeat. For yoga is perfect evenness of mind.

Seek refuge in the attitude of detachment and you will amass the wealth of spiritual awareness. Those who are motivated only by desire for the fruits of action are miserable, for they are constantly anxious about the results of what they do. When consciousness is unified, however, all vain anxiety is left behind. There is no cause for worry, whether things go well or ill. Therefore, devote yourself to the disciplines of yoga, for yoga is skill in action.

The wise unify their consciousness and abandon attachment to the fruits of action, which binds a person to continual rebirth. Thus they attain a state beyond all evil.

When your mind has overcome the confusion of duality, you will attain the state of holy indifference to things you hear and things you have heard. When you are unmoved by the confusion of ideas and your mind is completely united in deep Samadhi, you will attain the state of perfect yoga.

-          From the Bhagavad Gita