Vignana Bhairava Tantra - 48

Just empty space within

Dehantare Tvagvibhagam Bhitti Bhootam Vichintayeth
Nakinchit Antare Tasya Dhyayanadhyeya bhagbhaveth

One of the methods is to contemplate on the surface of the skin as a partition separating the space outside and inside. There is nothing within the body of yours, except space. Meditating thus, one becomes in tune with the space within that cannot be meditated upon.
- Swahilya Shambhavi.

Vignana Bhairava Tantra - 47

Nothing inside, but space

Sarvam Dehagatam Dravyam Viyadvyaptam Mrigekshane
Vibhavayet Tatastasya Bhavana sa Sthira Bhaveth

Oh one with eyes as a gazelle! Contemplate in this way, that all the parts inside the body is contained in and permeated and surrounded by space. In this manner, when the mind contemplates, it becomes as steady and still like space itself. - Swahilya Shambhavi

Vignana Bhairava Tantra - 46

You are empty within

Tanoodeshe Shoonyataiva Kshanamatram Vibhavayeth
Nirvikalpam Nirvikalpo Nirvikalpaaswaroopabhaat

Now this seems so easy to meditate upon something for just a moment. Consider or imagine, just for a moment, that there is only space inside this body. Imagine just a while that within your outer structure, covered totally by the skin, there is only empty space. This thought leads you to a thoughtless state of mind and you, the contemplating mind becomes that form of void. - Swahilya Shambhavi.

Vignana Bhairava Tantra - 45

Space around and within

Prishtashoonyam Moolashoonyam Hrid Shoonyam Bhavayetsthiram
Yugapad Nirvikalpatwat Nirvikalpodayastataha

By focussing one's awareness on the empty space behind, around and between the thoughts and also realising that in the heart of the thought too, there is nothing but empty space, the mind becomes in tune and merges with the space. In that state of Nirvikalpa, where there are no thought constructions or formations that divert the attention of the mind in one way or the other, there arises the ultimate truth that is always present. - Swahilya Shambhavi.

Vignana Bhairava Tantra - 44

The empty space

Prushta Shoonyam Moola Shoonyam Yugapad Bhavayeccha Yaha
Shareera Niripekshinya Shaktya Shoonyaman Bhaveth
There is a space behind the thoughts that arise in the mind and before there thoughts arise, at the root of it, there is space. One who contemplates on the space around the thoughts, soon merges into that void as the mind is not now dragged here and there by any particular thought form, but is focussing on the space around and through the thoughts.
- Swahilya Shambhavi.

Vignana Bhairava Tantra - 43

Your true body

Nijadehe Sarvadikkam Yugapad Bhaavayet Viyat

Nirvikalpa Manaas Tasya Viyat Sarvam Pravartate

As one contemplates on the four directions around the body, one comes to realise that the true body is directionless space. There is space to the front of you, space behind you, space to your right and space to your left. This space in which you are in, is endless. Contemplating on this space, the mind becomes motionless, like space and becomes that space ultimately. - Swahilya Shambhavi. (Pic: Above the clouds somewhere on earth between the United States and France! The Universe is shrouded by an ocean of endless space, which is our real body.)

Vignana Bhairava Tantra - 42

Beejakshara Sounds

Pinda Mantrasya Sarvasya Sthoola Varna Kramena tu
Ardhendubindunaadantaha Shoonyoccharaad Bhaveth Shivaha

Pinda is an egg. Egg is a seed, also called Beeja. Mantra is a word, when expanded, reads as Mananath Trayate Iti Mantraha - that sound which protects and liberates the mind. This Tantra says that, when one chants all the Beeja Mantras - letters of the Sanskrit alphabet dotted with a Makara or the sound of mmm...., the mind gets attuned to the most subtle vibrations that merges into consciousness. The way to chant these Bija mantras - for instance Aum...is like this.
Take in a deep breath. Experience the awareness in the navel region. When you exhale, let the breath go out with the sound of Om. After the sound is chanted fully, be with that silence and space. That is the experience of merging with Shiva. - Swahilya Shambhavi.