Of the first area, the Ten Commandments are the best example that most people are familiar with. The commandments provide an iron rod or guideline that can be followed when understanding, vision or faith are absent. Like traffic rules, merely following the specific instructions will keep one out of a great deal of serious trouble. In addition, most Elders Quorum Lessons contain attempts to direct the sharing of basic practical information. From an eternal perspective, we are like people who are learning how to live in a house.
Most mysteries are like the details of how bricks are made.
Interesting, but not really important to most people. While some of it is useful for specific problems or situations, most of it is better suited to intellectual exercise and enjoyment. Errata should not be confused with religion. This essay does not quantify or qualify the various types of errata. Sometimes errata is important.