John the Baptist was the forerunner for the Messiah, but he did not do it alone, he had helpers called “disciples”:
35 Again the next day after John stood, and two of his DISCIPLES; (John 1:35)
18 And the DISCIPLES of John shewed him of all these things. (Luke 7:18)
Jesus did many things on His own, but He too had helpers, also called disciples, and “apostles” and other “seventy.”
1 After these things the Lord appointed other SEVENTY also, and sent them two and two before his face into every city and place, whither he himself would come. (Luke 10:1–2)
13 And when it was day, he called unto him his DISCIPLES: and of them he chose twelve, whom also he named APOSTLES; (Luke 6:13)
We should understand that the prophecy of the “Messenger of the Covenant” who will prepare the way for the Messiah’s return will also have helpers; therefore, the prophecy should be read in the plural:
1 Behold, I will send my messenger[s], and
hethey shall prepare the way before me: and the Lord, whom ye seek, shall suddenly come to his temple, even the messenger[s] of the covenant, whom ye delight in: behold, he shall come, saith the Lord of hosts. (Malachi 3:1-3)
To prepare the citizens of Israel, the House of Israel, and the general public, there needs to be a missionary force the size of which the world has never before seen.
For more information: https://1111.org.il/messengers/