"God, who at various times and in various ways spoke in time past to the fathers by the prophets, has in these last days spoken to us by His Son . . . "
God used to speak to His Old Covenant church and to the world through prophets. Sometimes they would have dreams, visions, or other means of receiving His (God's) communication. Since Jesus Christ's ministry formally began (at His baptism by John), God has *only* spoken through Him. The Lord employed special ambassadors (as in the apostles of the NT); and He still does this today in the church's truly-called clergymen.
. . . But in *all*--not some--cases ever since Jesus inaugurated His ministry, God has *only* spoken through Christ. Why is this significant? For a lot of reasons; among them are these: Christians need not heed any "extra" revelation (like Mohammad's, or Joseph Smith's); and be-
lievers need heed *no one* who is not properly-ordained in Christ's church's ministry.
[Puritan quote of the day: "All the world is now seeking and tiring out themselves for rest; here [in Christ] only it can be found." --Thomas Shepard, in, "The Sincere Convert"]