Viveka / Discrimination:

Discrimination is the faculty which distinguishes between the real and the unreal. The whole world outside and the universe that is inside, are unreal. Earth, water, wind, fire, the sky, the ocean, our bodies and the vital force animating them, our minds, our consciousness of ourselves - all are but airy nothingness. The only real thing is the Atman (Self) or Brahman, the Absolute.

~ Sri Swami Sivananda

How will the mind become quiescent? - Sri Ramana Maharshi

Question: How will the mind become quiescent?

Bhagavan: By the enquiry ‘Who am I’. The thought ‘Who am I?’ will destroy all other thoughts, and like the stick used for stirring the burning pyre, it will itself in the end get destroyed. Then, there will arise Self-realisation.