Patanjali

"Undisturbed calmness of mind is attained by cultivating friendliness toward the happy, compassion for the unhappy, delight in the virtuous, and indifference toward the wicked."

- Patanjali

"The obstacles that distract thought are disease, apathy, doubt, carelessness, indolence, dissipation, false vision, failure to attain a firm basis in yoga, and restlessness."

- Patanjali

"A mind free from all disturbances is yoga."

- Patanjali

"The purpose of yoga is to stop the misery before it comes."

- Patanjali

"Yoga is the practice of quieting the mind."

- Patanjali