"I John, who also am your brother, and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos, for the word of God, and for the testimony of Jesus Christ. I was in the Spirit on the Lord's day, and heard behind me a great voice, as of a trumpet, saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea." (Revelation 1:9-11)
Exiled to the lonely and barren island of Patmos, John was not left without the comfort of God's Spirit. The Lord's Spirit is a very real presence in the believer's soul. Unfortunately, He is often equated with fleshly outbreaks of emotionalism and sensuality. However, a biblical examination of His working reveals that He guides the believer toward holiness, humility, peace and an overall closer walk with Christ. John was not left to his own and neither is the saint of today.
The kingdom of Christ is sure, yet patience is an inescapable part of the believer's journey toward that kingdom. James wrote, "But let patience have her perfect work, that ye may be perfect and entire, wanting nothing (James 1:4)." God has given the Christian over to His work of patience, and He will use it to perfect a man in such a way that simply could not be done otherwise.
The Lord's day may be in reference to the traditional day in which the Christian church met (Sunday), the Old Testament sabbath (Saturday) or simply this miraculous day in which the Lord Jesus chose to give His apocalypse.
The LORD is about to reveal things which concern the end, and yet, He is the beginning and the end. The prophet Isaiah reveals the fact that the LORD is there with the end, and only He has absolute control over all that is to come. "...I the LORD, the first, and with the last; I am he (Isaiah 41:4)."