He said: 'O Gargi, the Brahmanas call this the Akshara (the imperishable). It is neither coarse nor fine, neither short nor long, neither red (like fire) nor fluid (like water); it is without shadow, without darkness, without air, without ether, without attachment, without taste, without smell, without eyes, without ears, without speech, without mind, without light (vigour), without breath, without a mouth (or door), without measure, having no within and no without, it devours nothing, and no one devours it.'
In plain words: Yagnavalkya says the wise call the final ground the Akshara, which means 'the imperishable,' the thing that never decays. It has no size, shape, color, taste, smell or senses. It has no inside or outside. It eats nothing, and nothing can eat or destroy it.