REVELATION 1:7

Behold, He cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen.

Jesus Christ will come ‘with clouds’ at His Second Coming. Jesus told His disciples of how the tribes of the earth will see ‘the Son of man coming in the clouds of heaven with power and great glory.’ (Matthew 24:30) He also warned against those who would say otherwise: “Behold, I have told you before. 26Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not. 27For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.” (Matthew 24:25-27)

They also who ‘pierced’ Jesus will see Him. These are they who have sinned against Him and have not repented of their sins. Though the house of Israel had no part in the actual crucifixion of Jesus Christ, Peter charged them with crucifying Jesus, for their sins were the cause of His death: “Therefore let all the house of Israel know assuredly, that God hath made that same Jesus, whom ye have crucified, both Lord and Christ. 37Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?” (Acts 2:36-37)

‘All kindreds of the earth shall wail because of Him’ at the Second Coming of Jesus. Jesus spoke of how the tribes of the earth would mourn at His Coming: “And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.” (Matthew 24:30)

That John proclaimed the Second Coming of Jesus immediately after he had greeted the seven churches, indicates that they will live in the time of the Second Coming.