EN
The article deals with the relationship between the concepts of ‘emptiness’ and ‘Buddhа nature’ (佛性) as exposed in the Mahayanist Nirvāṇa-sūtra. On the basis of citations from the original text it is shown that according to the teaching of Nirvāṇa-sūtra to follow the middle way leading to nirvāṇa it is necessary to understand not only the ‘emptiness’ of illusions 空 (śūnyatā), but also the ‘emptiness’ of the true reality — which is the emptiness-ākāśa (虚空) or the ‘emptiness of first meaning’, ‘ultimate emptiness’(第一義空), being the only possible way of existence of the true reality or, in other words, of the Buddha nature (佛性).