Yoga is the settling of the mind into silence. When the mind has settled, we are established in our essential nature, which is unbounded Consciousness. Our essential nature is usually overshadowed by the activity of the mind.
PatanjaliThe way to eliminate ignorance is through steady, focused discrimination between the observer and the world.
PatanjaliSexual activity, and the thoughts and fantasies of sex, use up a great portion of our vital force. When that force is conserved through abstinence, it becomes sublimated as spiritual energy.
PatanjaliWhere the heart is full of kindness which seeks no injury to another, either in act or thought or wish, this full love creates an atmosphere of harmony, whose benign power touches with healing all who come within its influence. Peace in the heart radiates peace to other hearts, even more surely than contention breeds contention.
Patanjali