In the precious palace of the heart,

The pure aspect of the essence of original purity,  
Lies the radiance of the body of emptiness and clear light.
The perfection of the original wisdom body, 
The self-light sphere is there,  
And the colours of compassion are clear and manifest.  

As it is taught in the root tantra of the Great Perfection: 

“Self arising wisdom does not rely upon causes and conditions. Unobstructed wisdom is pure clarity.”