The mystery of the seven stars which you saw in My right hand, and the seven golden lampstands: The seven stars are the angels of the seven churches, and the seven lampstands which you saw are the seven churches. Revelation 1:20 NKJV
A golden lampstand (Menorah) was in the Holy Place of the wilderness tabernacle (Exodus 25). It had three branches on each side with one in the middle making seven lamps. Throughout Revelation Jesus uses illustrations that the readers would understand. Understanding the Old Testament today will help us understand the book of Revelation. The seven lampstands represent the seven churches that will receive the messages that will follow.
Jesus is standing with the seven lampstands representing the seven churches. He was with the seven stars, the leaders of the seven churches. Just as He was with the seven ancient churches, He is with us today.