2 Nephi 25:30
1830 Edition
And inasmuch as it shall be expedient, ye must keep the performances and ordinances of God, until the law shall be fulfilled which was given unto Moses.
Changes
Simple English
You must keep doing what God wants you to do. You must keep the ordinances of God. Keep doing this until the law is finished. The law was given to Moses.
Paraphrase
As long as it’s required, you must keep the rituals and ordinances God gave, until the law given to Moses is fulfilled.
Notes
"The Book of Mormon presents a very unusual picture of religious life between 600 B.C. and the coming of Christ. It claims that the ancient Nephites actually worshipped Jesus Christ and established Christian churches during this long period before Christ died and the New Testament was written. Bible scholars find it very hard to accept this claim, and they are even more puzzled when they learn that the Book of Mormon claims that the ancient Nephites also kept the Law of Moses at the same time. Between 559 and 545 B.C." -Jerald and Sandra Tanner, Joseph Smith's Plagiarism of the Bible in the Book of Mormon, p. 206.
Contrast 2 Nephi 25:24-30 and 2 Nephi 31:18 with 1 Peter 1:10-12; 1 Corinthians 2:7-8; John 7:39; and Colossians 1:26.
Wesley P. Walters writes in his Master's thesis: "The transplantation of New Testament material into the Old disrupts the dispensations that God has established in the unfolding of redemption, and confuses the Old and New Covenants and their respective ordinances. The Book of Mormon is careful to point out that the American Hebrew colony 'kept the law of Moses'... Yet Christian baptism was said to be taught among the Nephites five hundred years before Christ... Furthermore by 147 B.C. a Christian Church is depicted as flourishing, of which people become members through baptism... to introduce the New Testament practice of baptism in the name of Christ into the Old Testament period is to confuse the Old and New Covenants and the ordinances connected with each. The Book of Hebrews is very specific that while the Old Testament was in force, the New clearly was not... To introduce the features of the New Covenant into the time-period when the Old Covenant was in force is to confuse the two covenants to the extent of rendering them both meaningless... The Book of Mormon, by injecting the New Testament material into the Old Testament period, completely disrupts the biblical pattern so carefully set forth in the Old Testament itself and so faithfully guarded by the New." -Wesley P. Walters, "The Use of the Old Testament in the Book of Mormon," (Master's thesis, St. Louis: Covenant Theological Seminary, April 1981), pp. 15-17.