After declaring that Jehovah does not work in darkness, Nephi declares that what he does is for the benefit of the world. In particular, he will lay down his life to provide atonement for all humankind.
Starting in verse 25 there will be several verses that begin with the interesting rhetorical reversal which asks if the Lord has said something that we know to be contrary to what Jehovah desires. Here, Nephi asks if Jehovah says to any, “depart from me.” The answer, of course, is no. The ending phrase conflates Isaiah 7:22, “And it shall come to pass, for the abundance of milk that they shall give he shall eat butter: for butter and honey shall every one eat that is left in the land,” and Isaiah 55:1 “Ho, every one that thirsteth, come ye to the waters, and he that hath no money; come ye, buy, and eat; yea, come, buy wine and milk without money and without price.”