D&C 131

Scriptural verses tend to teach us true principles and doctrine. But they are not always exclusive of themselves. That is the error many scriptural scholars make. As we read and study the scriptures, we need to combine all principles to understand the fulness of the doctrine. There are many scriptures that suggest that if we do this single principle, we will be saved. But more is usually required. By revelation, the Prophet Joseph Smith taught -

"It is impossible for a man to be saved in ignorance." (Doctrine and Covenants | Section 131:6)

This condition suggests that even through the atonement of Jesus Christ, there still is an obligation for man to receive knowledge and with that I would add that man must then use their agency.

Elder John A. Widstoe taught -

"Knowledge tested and tried is the beginning of faith. For that reason, 'it is impossible for a man to be saved in ignorance.' The extent of a person's faith depends in part on the amount of his knowledge. The more knowledge he gathers, the more extensive becomes his field of faith. The degree of faith possessed by any man depends not upon the extent of his knowledge, but upon the certainty of his knowledge, which leads to the proper use of his knowledge. Thus a man of great knowledge may have weak faith, while one of limited information may have strong faith. (Alma 32:34-41.)" (John A. Widtsoe, JS, p. 163.)

The Prophet Joseph Smith also taught -

"A man is saved no faster than he gets knowledge, for if he does not get knowledge, he will be brought into captivity by some evil power in the other world, as evil spirits will have more knowledge, and consequently more power than many men who are on the earth. Hence it needs revelation to assist us, and give us knowledge of the things of God." (Joseph Smith, HC 4:588.)