The Testimony of Jesus is typically understood to be the same as “a testimony of Jesus”, at least this is how it is presently taught, and how it is generally understood by many– I grew up understanding the term “the testimony of Jesus” means my testimony of Him. I do have [a] testimony of Jesus Christ, I do have knowledge of Him and that He lives, but that is not what this means, “the testimony of Jesus” means something completely different than “a testimony of Jesus”.
After you have entered by the way, what comes next? Nephi clearly explains the next step as receiving the Holy Ghost and that through the Holy Ghost you will be led to Christ, and that He [Christ] shall manifest himself unto you, and Christ will lead you to the Father, and no man comes unto the Father but by Him (John 14:6, Luke 10:22). Nephi laments because he perceives that you still do not comprehend his message or what he is trying to convey after you have entered in by the way.
“But before the great day of the Lord shall come, Jacob shall flourish in the wilderness, and the Lamanites shall blossom as the rose.”
How then is this to be fulfilled, how then are you the Sons’ (daughters) of the Forest are to blossom as a rose, I would suggest it begins to be fulfilled by repentance and coming unto Him and entering in by the way, through being baptized in living waters in His name, taking upon yourself His name, the name of the Lamb of God, who is Jesus Christ, “and then cometh a remission of your sins by fire and by the Holy Ghost.”
At that day when the Gentiles shall sin against the gospel, having rejected the fullness of His gospel, lifting themselves up in the pride of their hearts above the whole earth, He will remember His covenant He has made with His people, the House of Israel. He will bring the gospel from among the Gentiles, or in other words, He will take the gospel from them and give it unto the remnant of the House of Jacob, the Indians, and in that day, the priesthood and power of God will no longer be with the Gentiles, but with the remnant, and the Gentiles will not have power (priesthood) over them.
This land, the land of promise, is a “promise” given by covenant that would extend from one generation to the next, forever, to Lehi and his family. He obtained it, for themselves and his posterity as an inheritance from the Lord, others also. Lehi reveals the Lord would lead others here from “other countries” the promises associated with this land in particular also belong to them.