I have been looking at the “wise purposes” mentioned in the Book of Mormon and in D&C 10. This is similar but just doesn’t use the word “wise.” But in other passages and this one, the purpose is to fulfill God’s promise to bring the words of the Nephite prophets to the descendants of Lehi.
16 Nevertheless, my work shall go forth, for inasmuch as the knowledge of a Savior has come unto the world, through the testimony of the Jews, even so shall the knowledge of a Savior come unto my people—
18 And this testimony shall come to the knowledge of the Lamanites, and the Lemuelites, and the Ishmaelites, who dwindled in unbelief because of the iniquity of their fathers, whom the Lord has suffered to destroy their brethren the Nephites, because of their iniquities and their abominations.
20 And that the Lamanites might come to the knowledge of their fathers, and that they might know the promises of the Lord, and that they may believe the gospel and rely upon the merits of Jesus Christ, and be glorified through faith in his name, and that through their repentance they might be saved. Amen.