We have to consider what our actual apostles and prophets say as scriptures? We were discussing this subject with some brothers and I think they speak to us acording to the Father’s will, like the prophets in Bible or in the Book of Mormon. In olden days, they didn’t have the Bible or The Book of Mormon like a canonized book. Maybe like a magazine or something like that and then they put it together we now have this sacred books. I hope you understand me.
In order to answer your question correctly I would like to share a scripture verse found in D&C 68:4 which explains an important aspect before we consider our apostles and prophets words as scripture:
“And whatsoever they shall speak when moved upon by the Holy Ghost shall be scripture, shall be the will of the Lord, shall be the mind of the Lord, shall be the word of the Lord, shall be the voice of the Lord, and the power of God unto salvation.”
We discover from this verse that when our prophets and apostles speak when moved upon by the spirit their words are scripture, and we know if they have spoken by the spirit if:
1. The words were the will of the Lord
2. The words were the mind of the Lord
3. The words were the word of the Lord
4. The words were the voice of the Lord
If our prophets and apostles words do not conform to this, then we can know for ourselves that they are speaking their own thoughts, and what they feel to be true.
Thus, the responsibility lies upon the members to be themselves in tuned with the spirit and the will of the Lord, such that we come to easily recognize scripture, verses their opinion.