10209. 'Once a year' means everlastingly. This is clear from the meaning of 'once a year' as for the whole year; for the expiation on the horns of the altar of incense once a year implied expiation for the whole year. 'A year', like all references to time, means a state and its duration, and also everlastingness. In this instance it is a state of purification from evils by means of the truths of faith; for this state is meant by expiation on the horns of the altar of incense once a year, and all purification from evils, which is regeneration, persists everlastingly not only in the world but also in the next life.