Vijnana Bhairava Tantra
121: That, intuition which emerges from the intense devotion of one who is perfectly detached is known as the Shakti of Shankara. By contemplating regularly on that shakti, Shiva is revealed there.
122: When one perceives a particular object, vacuity is established regarding all other objects. Contemplating on that vacuity verily, even though the particular object is still known or perceived, the mind rests in tranquility.
123: What people of little understanding believe to be purity is neither pure nor impure to one who has experienced shiva. Nirvikalpa, or freedom from vikalpas, is the real purification by which one attains happiness.
124: The reality of bhairava dwells everywhere, even in ordinary people. By contemplating thus, There is nothing other than Him, one attains the non-dual state of awareness.
125: Because of the conviction that everything is full of Brahman (who is also the essential Self of all), the aspirant has the same attitude towards friend and foe, remains the same both in honour and dishonour, and thus because of this conviction of the presence of Brahman everywhere, he is perpetually happy.