In Alma 29:8 we find the following:
For behold, the Lord doth grant unto all nations, of their own nation and tongue, to teach his word; yea, in wisdom, all that he seeth fit that they should have; therefore we see that the Lord doth counsel in wisdom, according to that which is just and true.
Orson F. Whitney comments in this regard:
All down the ages men bearing the authority of the Holy Priesthood--patriarchs, prophets, apostles and others, have officiated in the name of the Lord, doing the things that he required of them; and outside the pale of their activities other good and great men, not bearing the Priesthood, but possessing profundity of thought, great wisdom, and a desire to uplift their fellows, have been sent by the Almighty into many nations, to give them, not the fulness of the Gospel, but that portion of truth that they were able to receive and wisely use. Such men as Confucius, the Chinese philosopher; Zoroaster, the Persian sage; Gautama or Buddha, of the Hindus; Socrates and Plato, of the Greeks; these all had some of the light that is universally diffused, and concerning which we have this day heard. They were servants of the Lord in a lesser sense, and were sent to those pagan or heathen nations to give them the measure of truth that a wise Providence had alloted to them.
[Orson F. Whitney, Conference Report, April 1921, Afternoon Session, 33]