Interesting article on the kingdom! I like how the TGC article you referenced pointed out that sometimes the kingdom of God may break in more and more in certain spots, but it's not expanding.
They reference the Joseph Smith translation which has Matthew 6:38 which reads "Seek not the things of this world but seek ye first to build up the kingdom of God, and to establish his righteousness”.
Interesting article on the kingdom! I like how the TGC article you referenced pointed out that sometimes the kingdom of God may break in more and more in certain spots, but it's not expanding.
If it helps point us better to taking the kingdom as NOT expanding as an orthodox belief, the LDS group has an article in their institute about building the kingdom of God (https://www.churchofjesuschrist.org/study/manual/the-gospel-and-the-productive-life-student-manual-2018/chapter-8?lang=eng)
They reference the Joseph Smith translation which has Matthew 6:38 which reads "Seek not the things of this world but seek ye first to build up the kingdom of God, and to establish his righteousness”.