The circumstances under which section 43 was given was that there were those who claimed revelations and were trying to introduce false teachings into the church. So God made provision that the law of the church should be given through the president of the church, but this would not prevent God giving revelations to individuals direction them how to carry out the law already given.

In Doc. and Cov., section 42:12-13, the elders, priests and teachers were to teach the principles of the gospel which are in the Bible, Book of Mormon, and Doctrine and Covenants. And in verse 16 they were told: "And ye shall lift up your voice by the comforter, ye shall speak and prophecy as seemeth me good." So why should you object?

Section 43 was to warn them against receiving anything that was in conflict with the law, from any source. In other words, a warning against false doctrines such as polygamy, Adam-god doctrine, and blood atonement as taught by Brigham Young.