An interesting difference between the Nephi and Matthew versions is found in the salt and light verses. The phrase, I give unto you, indicates that the Lord is giving the people the assignment or charge to be the light of their people, whereas the Old World apostles were told more directly, Ye are the light of the world. Scholars have debated about whether this scripture applies to all Christians or just the Twelve. From the Book of Mormon, we learn that the Lord expects all his disciples to be a light to their respective peoples that they may see your good words and glorify your Father who is in heaven.
Gordon B. Hinckley
"I wish to say that none of us ever need hesitate to speak up for this Church, for its doctrine, for its people, for its divine organization and divinely given responsibility. It is true. It is the work of God. The only things that can ever embarrass this work are acts of disobedience to its doctrine and standards by those of its membership. That places upon each of us a tremendous responsibility. This work will be judged by what the world sees of our behavior. God give us the will to walk with faith, the discipline to do what is right at all times and in all circumstances, the resolution to make of our lives a declaration of this cause before all who see us. (Ensign, November 1996, p. 51.)
Franklin D. Richards
"Our light should not be hid under the bed or under a bushel, but it ought to be lit up here in these mountains, and it has got to shine so that this whole nation shall see it. And all nations must see and have a chance of accepting or rejecting the Gospel. We must fraternize with them, as far as is right and proper, so that we may show them the excellency there is in the knowledge of God…
"Now, then, we ought to understand that our labors and our conduct individually and collectively are open before the world, our conduct and attitude as a people before the nation, should be according to the dignity of our position, that the nations of the earth may see and know we are true to our God, to our professions of faith, and that we are honestly pushing forward the kingdom of God. This should be the spirit of the whole people. We should be ready to make any sacrifice, and discharge every obligation necessary for the advancement of His kingdom." (Collected Discourses, Vol.1, Franklin D. Richards, April 8, 1888)
Eldred G. Smith
"Today, my brothers and sisters, that command is directed to us. We have received a light and knowledge that was given to the disciples of old. It is our responsibility to let our light so shine until it really reaches the ends of the earth.
"If each individual member of this entire Church would sincerely strive to do his or her best, just think what might be accomplished. We can spread gloom around us, we can spread good cheer, or we can be such an example of righteousness that others will want to follow the pattern of our lives. A chain reaction goes on that is endless in its effects. When a knowledge of the divinity of the gospel is given to you, you can pass it on to others. If you are living the gospel, they will hear your testimony. Remember the saying: 'How can I hear what you are saying, when what you are is ringing so loudly in my ears?'" (Conference Report, Oct. 1951, p. 81)