Some Definitions from the Classic Scriptures
“Yoga is the cessation (of identifying with) the fluctuations (thought waves) in the mind” – Patanjali 1.2
“Whatever you do, make it an offering to me – the food you eat, the sacrifices you make, the help you give, even your suffering. In this way you will be freed from the bondage of karma, and from its results both pleasant and painful. Then, firm in renunciation and yoga, with your heart free, you will come to me.” – Bhagavad Gita (9.27-28)
“Those who aspire to the state of yoga should seek the Self in inner solitude through meditation. With body and mind controlled they should constantly practice one-pointedness, free from expectations and attachment to material possessions.” – Bhagavad Gita (6.10, 47)
“Cut through this doubt in your heart with the sword of spiritual wisdom. Arise, take up the path of yoga!” – Bhagavad Gita (4.42)
“Remaining pure amidst impurites,
this is the way to attain Yoga.
By mere words, Yoga is not attained.
One who looks upon all with a single eye,
and knows them to be one and the same –
he alone is known as a Yogi.”
– Guru Nanak, Siri Guru Granth Sahib (Suhi)
“Yoga is the union of the individual’s consciousness with the Infinite Consciousness.” – Aquarian Teacher Manual
In case you would like to read little bit more about the topic, please check out my blog post Not Affected by Pleasure.