The srutis [scriptures] speak of the Self as being the size of one's thumb, the tip of the hair, an electric spark, vast, subtler than the subtlest, … - Ramana Maharshi

" "

The srutis [scriptures] speak of the Self as being the size of one's thumb, the tip of the hair, an electric spark, vast, subtler than the subtlest, etc. They have no foundation in fact. It is only being, but different from the real and the unreal; it is knowledge, but different from knowledge and ignorance. How can it be defined at all? It is simply being.