[Two Greek words are used in the New Testament for the world: Kosmos and Aion. Kosmos means the material world and Aion means era or age. Aion is used each time. Christ is thus referring to the end of an age or dispensation, and not a physical world—newer Bibles also use ‘age.’]
The list of messiah claimants is long, but there is only one Christ who came in the flesh: Jesus Christ. "Howbeit when he, the Spirit of truth, is come, he will guide you into all truth." (John 16:13). "By this you know the Spirit of God: Every spirit that confesses that Jesus Christ is come in the flesh is of God..." (1 John 4:2-3). "Beloved, believe not every spirit, but test the spirits whether they are of God: because many false prophets are gone out into the world." (I John 4:1). "Prove all things; hold fast that which is good." (I Thess. 5:21). "By their fruit you will recognize them." (Matt 7:16-20).
The Thirty Years War (1562-1598) and French Wars of Religion (1618-1648) between Protestants and Catholics, the Napoleonic Wars (1804-1815) and the Seven Years’ War (1756-1763) involving European Powers, The War of 1812 (1812-1815) between America and the British empire, The First Opium War (1839-1842) between the U.K. and China, the American Civil War (1861-1865), several Ottoman Wars, and of course the World Wars, among others. The four famines of the 1800s; The major Influenza and Cholera pandemics occurring from 1729-1920; Earthquakes have shaken the earth repeatedly, including the quake prophesized in Zechariah 14:4; which all reveal that at any moment this prophecy could be seen as fulfilled, and likely sometime in the 19th century.
Many publications in the mid-1800’s stated that the Bible was being preached in every nation (ref. A Hundred Years of Missions by Leonard, Eight Dissertations by Faber, Our Day in the Light of Prophecy by Spicer, An Exposition of the Prophecies by Dowling, etc…). “In 1816, the American Bible Society was formed. George Storrs, in the newspaper “Midnight Cry,” on the 4th of May, 1843, stated that these two societies [British and American]…were spreading the Gospel of Christ in every part of the world” (ref. Thief in the Night by Sears). As a result, Biblical scholars predicted that this prophecy would be fulfilled by 1844.
Christ warns that the ‘day and hour knoweth no man,’ but also refers to Daniel, who gives general time prophecies; however, Daniel’s prophecies are sealed until the end time (Dan. 12:9). They have now been unsealed: Daniel prophesies 70 weeks (in 9:24) (A day for a year: Num. 14:34 & Ezk. 4:4-6) (70 weeks = 490 days = 490 years) after the Order to restore Jerusalem (457 BC) (Ezra 7) the ‘Messiah will be cut off.’ Thus, 457 + 33 [Crucifixion Age] = 490 years. Using 457 B.C. for Daniel’s desolation prophecy (in 8:13-14): 2300 days (years) from 457 BC (no year 0) gives year 1844. Daniel 9:25, 12:7, & 12:11 are all unsealed (ref. Some Answered Questions and Lights of Guidance).
In 70 A.D., Jerusalem was destroyed by the Roman Titus, and the Jews were exiled exactly as had been foretold by Christ. The Holy Land was hence occupied and ruled by Gentiles (non-Jews), until the Ottoman Empire, who ruled Jerusalem, was pressured to an agreement called the Edict of Toleration on Mar. 21, 1844 (ref. Public Record’s office—London), initiating a stop to the persecution of Christians and permitting religious freedom in its territory, and for the first time began the Restoration of the Jews to the Holy Land, followed by WWI and the fall of the Ottoman Empire—described in the Book of Revelation as the eighth and a beast (Rev. 17:11), its ruler described as a prideful king (Dan. 11:36), an anti-Christ (1 John 2:22), and a man of lawlessness (II Thess. 2), and defeated at the Battle of Armageddon-1918 (Rev. 16:16).
“The day of the Lord will come as a thief in the night…” (II Peter 3:10). “And the government shall be upon His shoulder…” (Isaiah 9:6-7). “Carmel and Sharon, they shall see the glory of the Lord…” (Isaiah 35:2). [images of Mount Carmel and the Sharon plain].
“…And a cloud hid Him from their sight...” (Acts 1:3-11). “Behold, He cometh with clouds; and every eye shall see Him…” (Rev 1:7). “…Though seeing, they do not see…” (Matt. 13:13-15). [the Hebrew meaning of 'cloud'].
“…For in such an hour as ye think not the Son of man cometh.” (Matt. 24:44). “For the Son of man shall come in the Glory of His Father.” (Matt. 16:27). “And the glory of the LORD came…by the way of the gate…” (Ezekiel 43:4-5). “Beware of false prophets…Ye shall know them by their fruits…” (Matt. 7:15-23). [the 'fruits'].
As it was in the days of Noah, so it will be at the coming of the Son of Man. For in the days before the flood, people…knew nothing about what would happen until the flood came and took them all away. That is how it will be at the coming of the Son of Man.” (Matt. 24:37). [the story of Noah].
“For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first: Then we which are alive [and] remain shall be caught up together with them in the clouds, to meet the Lord in the air.” (1 Thessalonians 4:16-17). [to be 'caught up' or raptured].
"And the city lieth foursquare, and the length is as large as the breadth: and he measured the city with the reed, twelve thousand furlongs. The length and the breadth and the height of it are equal." (Revelation 21:16) [the City of the Law of God]
“Say, Lo! The Father is come, and that which ye were promised in the Kingdom is fulfilled!”