The emptiness which is nothingness, and the emptiness of mind, are two different things.

The emptiness which is nothingness does not exist at all.

The emptiness of mind does not have any form or colour or shape, so in a certain way it is non-existent, but at the same time it is everything. It gives rise to the whole of samsara and nirvana.

-- His Holiness Penor Rinpoche