Yassa param aparam va
paraparam na vijjati
Vitaddaram visamyuttam
tamaham brumi brahmanam.

Him I call a brahmana who has for him neither this shore (i.e., the sense-bases) nor the other shore (i.e., the sense objects), and who is undistressed and free from moral defilements.

'This shore' and 'the other shore' are used in the sense of the internal and the external ayatanas. The internal ayatanas are the sense bases, viz, the eye, the ear, the nose, the tongue, the body and the mind; the external ayatanas are the sense objects, viz., visible object, sound, odour, taste, touch and mind-object.

For a true Brahmana (i.e., arahat) there is neither 'this shore' nor 'the other shore' which means that the senses of the arahat are calmed, and his passions extinguished.