Cave of the Heart:
Yo veda nihitam guhayam parame vyoman so'snute sarvan kaman saha brahmana vipascita
- Taittiriya Upanishad
This is an oracle in the second section of the Taittiriya Upanishad which gives us the secret of the final attainment of bliss and freedom. This satyam jnanam anantam brahma, this Supreme Truth-Knowledge-Bliss-Infinity is, of course, as has been mentioned before, everywhere. It is also hidden deeply in the cave of your own heart - nihitam guhayam. Guha is the cave, the deepest recess of your own being. That is verily this Ultimate Being. You have to be very cautious in not allowing this thought to slip out at any time - namely, your deepest recess of existence cannot be outside the deepest recess of the cosmos. The all-encompassing nature of Brahman also envelops your basic being.
- Swami Krishnananda
Thus realizing the nature of the Parmaatamaa, the one who is in the cavity of the Heart, who is without parts (or body), without a second, the witness of all, beyond both existence and non-existence, one attains the very nature of the Parmaatamaa.
- Kaivalya Upanishad
My Beloved dwells in the cave of my Heart. O God, shatter the wall of doubt; please grab hold of me, and lift me up towards Yourself.
The world-ocean is so vast and deep; please be kind, lift me up and place me on the shore.
In the Spiritual Company, God's Feet (Divine Name) are the boat to carry us across.
The One who placed you in the womb of your mother’s belly — no one else shall save you in the wilderness of corruption.
The power of God's Sanctuary is all-powerful;
Nanak does not rely on any other.
- Guru Granth Sahib
There is a beautiful place Within this cave of the Heart.
- Guru Granth Sahib
The Unstruck Melody resounds and resonates in Sahaj. I rejoice in the Eternal Bliss by engaging in the (Guru's) Shabad. (Because of this) I sit in Samadhi in the cave of Sahaj absorbed or established (in the feet of) the Highest Lord.
- Guru Granth Sahib
Who knows that which is hidden in the Heart's secret cave, he cuts here and now, my dear, the knot of ignorance.
- Mundaka Upnishad