Thus does one bind together and heal any break in the sacrifice by means of (the Vyâhritis or sacrificial interjections which are) the essence and strength of the three worlds, of the deities, and of the threefold knowledge. That sacrifice is healed in which there is a Brahman priest who knows this.

In plain words: In the same way, any break in the ritual is repaired with the three sacred words. These words hold the essence of the worlds, the gods and the Vedas. A ritual is made whole when its overseeing priest knows this.