On the quarter of the world which he is going to praise. Lastly, having approached himself (his name, family, &c.) by meditation, let him sing the hymn of praise, reflecting on his desire, and avoiding all mistakes in pronunciation, &c. Quickly will the desire be then fulfilled to him, for the sake of which he may have offered his hymn of praise, yea, for which he may have offered his hymn of praise.

In plain words: He should think of the direction of the world he is praising, and finally of himself. Then, keeping his wish in mind and pronouncing every word correctly, he should sing. His wish will soon come true.