First, the Journal of Dicourses is not scripture, and it is not where the “Doctrine of the Church,” is offical.
It is a set of sermons and speeches given by members and leaders of the Church over a long period of time.
Some of it is Doctrine, other is not, but is the personal feelings of those who gave it. You can find the official Church doctrine on the Church web site:
Now, as to that quote, I believe that when He returns, which is when this is referring to, that the Lord Jesus Christ shall rule the whole earth, and I believe He shall accomplish it through the body of His saints, through His church.
Will that be exactly like the LDS Church is today?...porbably not exactly, but we believe it will be very close and that He will institute it and use it to govern in perfect rightousness, which we as imperfect mortals cannot do.
Whatever it is, all of us who truly and sincerely believe in, have faith in, and have accepted Him will be there to witness it and will all gladly abide by it at that day.
Say what ever in your man made teachings - but DO NOT ADD 'GOD said' 'God decreed' or the HOLY SPIRIT this or Jesus said, unless it is Scriptural - because as THEY ARE ONE - THEY AGREED - or any other of manipulation words to insinuate it.
“What the world calls ‘Mormonism’ will rule every nation...God has decreed it, and his own right arm will accomplish it. This will make the heathen rage.
Remember - everything that is not of God will be destroyed when HE returns and that includes any man made teachings - ONLY TRUTH will stand and rule. And that 'Mormonism' statement will go up in smoke! As THE TRUTH comes from HIM ALONE!!
"“The Journal of Discourses deservedly ranks as one of the standard works of the Church, and every rightminded Saint will certainly welcome with joy every number (issue) as it comes forth.“ (President George Q. Cannon, Journal of Discourses, Preface, Volume 8.)"
http://www.journalofdiscourses.org/