The inquiry "who am I" turns the mind introvert and makes it calm.
The degree of freedom from unwanted thoughts and the degree of concentration on a single thought are the measures to gauge spiritual progress.
That which is not present in deep dreamless sleep is not real
Misery does not exist in reality but only in mere imagination.
Remain still, with the conviction that the Self shines as everything yet nothing, within, without, and everywhere.
An unawakened person sees only his mind, which is merely a reflection of the light of pure consciousness arising from the Heart.