President Dallin H. Oaks, First Counselor in the First Presidency of the Church of Jesus Christ of Latter-day Saints said in April 2020 general conference:
In these conference meetings, as we seek brief shelter from our mortal concerns with a devastating pandemic, we have been taught great principles of eternity. I encourage each of us to have our eye “single” to receive these truths of eternity so that our bodies “shall be full of light” (3 Nephi 13:22).
In His sermon to multitudes recorded in the Bible and in the Book of Mormon, the Savior taught that mortal bodies can be full of light or full of darkness. We, of course, want to be filled with light, and our Savior taught us how we can make this happen. We should listen to messages about the truths of eternity. He used the example of our eye, through which we take light into our bodies. If our “eye be single”—in other words, if we are concentrating on receiving eternal light and understanding—He explained, “thy whole body shall be full of light” (Matthew 6:22; 3 Nephi 13:22). But if our “eye be evil”—that is, if we look for evil and take that into our bodies—He warned, “thy whole body shall be full of darkness” (verse 23). In other words, the light or darkness in our bodies depends on how we see—or receive—the eternal truths we are taught.
We should follow the Savior’s invitation to seek and ask to understand the truths of eternity. He promises that our Father in Heaven is willing to teach everyone the truths they seek (see 3 Nephi 14:8). If we desire this and have our eye single to receive them, the Savior promises that the truths of eternity “shall be opened” unto us (see 3 Nephi 14:7–8) (For the complete talk, click. . . . ‘The Melchizedek Priesthood and Priesthood Keys’)

