These two (the two ears) are the Rishis Gautama and Bharadvaga; the right Gautama, the left Bharadvaga. These two (the eyes) are the Rishis Visvamitra and Gamadagni; the right Visvamitra, the left Gamadagni. These two (the nostrils) are the Rishis Vasishtha and Kasyapa; the right Vasishtha, the left Kasyapa. The tongue is Atri, for with the tongue food is eaten, and Atri is meant for Atti, eating. He who knows this, becomes an eater of everything, and everything becomes his food.

In plain words: The passage names the senses after famous sages called Rishis: the two ears, two eyes and two nostrils each match a pair of sages, and the tongue is the sage Atri, whose name sounds like the word for eating. Whoever knows this can enjoy everything as his food.