No Substitute for the Truth
Abstract: Just because you agree with yourselves does not mean you are right, nor that you speak for God, nor that He agrees with you.
Some Notable Examples of Mutual Agreement in the Scriptures
And all they in the synagogue, when they heard these things, were filled with wrath, and rose up, and thrust him [Jesus] out of the city, and led him unto the brow of the hill whereon their city was built, that they might cast him down headlong.
The Jews were mutually agreed against Jesus.
Then the high priest rent his clothes, saying, He [Jesus] hath spoken blasphemy; what further need have we of witnesses? behold, now ye have heard his blasphemy. What think ye? They answered and said, He is guilty of death.
The Jews were mutually agreed against Jesus.
Then they cried out with a loud voice, and stopped their ears, and ran upon him [Stephen] with one accord, and cast him out of the city, and stoned him[.]
The Jews were mutually agreed against Steven.
And when Gallio was the deputy of Achaia, the Jews made insurrection with one accord against Paul, and brought him to the judgment seat, saying, This fellow persuadeth men to worship God contrary to the law.
The Jews were mutually agreed against Paul.
And now it came to pass that the judges did expound the matter unto the people, and did cry out against Nephi, saying: Behold, we know that this Nephi must have agreed with some one to slay the judge, and then he might declare it unto us, that he might convert us unto his faith, that he might raise himself to be a great man, chosen of God, and a prophet.
The judges were mutually agreed against Nephi.
Now the Zoramites were dissenters from the Nephites; therefore they had had the word of God preached unto them. But they had fallen into great errors, for they would not observe to keep the commandments of God, and his statutes, according to the law of Moses. Neither would they observe the performances of the church, to continue in prayer and supplication to God daily, that they might not enter into temptation. Yea, in fine, they did pervert the ways of the Lord in very many instances[.] [T]he Zoramites had built synagogues, and that they did gather themselves together on one day of the week, which day they did call the day of the Lord; and ... they had a place built up in the center of their synagogue, a place for standing, which was high above the head; and the top thereof would only admit one person. Therefore, whosoever desired to worship must go forth and stand upon the top thereof, and stretch forth his hands towards heaven, and cry with a loud voice, saying: Holy, holy God; we believe that thou art God, and we believe that thou art holy, and that thou wast a spirit, and that thou art a spirit, and that thou wilt be a spirit forever. Holy God, we believe that thou hast separated us from our brethren; and we do not believe in the tradition of our brethren, which was handed down to them by the childishness of their fathers; but we believe that thou hast elected us to be thy holy children; and also thou hast made it known unto us that there shall be no Christ. But thou art the same yesterday, today, and forever; and thou hast elected us that we shall be saved, whilst all around us are elected to be cast by thy wrath down to hell; for the which holiness, O God, we thank thee; and we also thank thee that thou hast elected us, that we may not be led away after the foolish traditions of our brethren, which doth bind them down to a belief of Christ, which doth lead their hearts to wander far from thee, our God. And again we thank thee, O God, that we are a chosen and a holy people. Amen.
The Zoramites did not believe God's words and would not do what He said to do. They were mutually agreed that they were the people of God, and in their worship raised both hands to heaven to celebrate their own status as God's chosen people and also their separation from their childish and foolish brethren. They had revelation telling them they were right and the people of God and everyone who disagreed with them was wrong and not the people of God.
And it came to pass that after the more popular part of the Zoramites had consulted together concerning the words which had been preached unto them, they were angry because of the word, for it did destroy their craft; therefore they would not hearken unto the words. And they sent and gathered together throughout all the land all the people, and consulted with them concerning the words which had been spoken. Now their rulers and their priests and their teachers did not let the people know concerning their desires; therefore they found out privily the minds of all the people. And it came to pass that after they had found out the minds of all the people, those who were in favor of the words which had been spoken by Alma and his brethren were cast out of the land; and they were many; and they came over also into the land of Jershon.
After Alma and his brethren preached to them, the Zoramites were mutually agreed again once the more popular among them kicked out everyone who disagreed. They found out who disagreed by privately interviewing people without telling them why they were being interviewed.
3 Nephi 3:2-10
Lachoneus, most noble and chief governor of the land, behold, I write this epistle unto you, and do give unto you exceedingly great praise because of your firmness, and also the firmness of your people, in maintaining that which ye suppose to be your right and liberty; yea, ye do stand well, as if ye were supported by the hand of a god, in the defence of your liberty, and your property, and your country, or that which ye do call so. And it seemeth a pity unto me, most noble Lachoneus, that ye should be so foolish and vain as to suppose that ye can stand against so many brave men who are at my command, who do now at this time stand in their arms, and do await with great anxiety for the word—Go down upon the Nephites and destroy them. And I, knowing of their unconquerable spirit, having proved them in the field of battle, and knowing of their everlasting hatred towards you because of the many wrongs which ye have done unto them, therefore if they should come down against you they would visit you with utter destruction. Therefore I have written this epistle, sealing it with mine own hand, feeling for your welfare, because of your firmness in that which ye believe to be right, and your noble spirit in the field of battle. Therefore I write unto you, desiring that ye would yield up unto this my people, your cities, your lands, and your possessions, rather than that they should visit you with the sword and that destruction should come upon you. Or in other words, yield yourselves up unto us, and unite with us and become acquainted with our secret works, and become our brethren that ye may be like unto us—not our slaves, but our brethren and partners of all our substance. And behold, I swear unto you, if ye will do this, with an oath, ye shall not be destroyed; but if ye will not do this, I swear unto you with an oath, that on the morrow month I will command that my armies shall come down against you, and they shall not stay their hand and shall spare not, but shall slay you, and shall let fall the sword upon you even until ye shall become extinct. And behold, I am Giddianhi; and I am the governor of this the secret society of Gadianton; which society and the works thereof I know to be good; and they are of ancient date and they have been handed down unto us. And I write this epistle unto you, Lachoneus, and I hope that ye will deliver up your lands and your possessions, without the shedding of blood, that this my people may recover their rights and government, who have dissented away from you because of your wickedness in retaining from them their rights of government, and except ye do this, I will avenge their wrongs. I am Giddianhi.
The robbers were mutually agreed against the Nephites and sought by lies, flattery, and threats, to bring the Nephites into mutual agreement with them.
And it came to pass that Akish gathered in unto the house of Jared all his kinsfolk, and said unto them: Will ye swear unto me that ye will be faithful unto me in the thing which I shall desire of you? And it came to pass that they all sware unto him, by the God of heaven, and also by the heavens, and also by the earth, and by their heads, that whoso should vary from the assistance which Akish desired should lose his head; and whoso should divulge whatsoever thing Akish made known unto them, the same should lose his life. And it came to pass that thus they did agree with Akish. And Akish did administer unto them the oaths which were given by them of old who also sought power, which had been handed down even from Cain, who was a murderer from the beginning. And they were kept up by the power of the devil to administer these oaths unto the people, to keep them in darkness, to help such as sought power to gain power, and to murder, and to plunder, and to lie, and to commit all manner of wickedness and whoredoms. And it was the daughter of Jared who put it into his heart to search up these things of old; and Jared put it into the heart of Akish; wherefore, Akish administered it unto his kindred and friends, leading them away by fair promises to do whatsoever thing he desired. And it came to pass that they formed a secret combination, even as they of old; which combination is most abominable and wicked above all, in the sight of God; for the Lord worketh not in secret combinations, neither doth he will that man should shed blood, but in all things hath forbidden it, from the beginning of man.
And here we have a situation where mutual agreement is abominable to God.
As these examples show, mutual agreement does not mean a group is correct in its decisions. Just because you agree with yourselves doesn't mean you are right, nor that you speak for God, nor that God agrees with you.