What does Revelation 21:6 mean?
This verse tells us the speaker from the throne identified Himself as the Alpha and the Omega. These are the first and last letters of the Greek alphabet. When the glorified Son of God first appeared to John on the island of Patmos, John had just introduced God's status as "I am the Alpha and the Omega…who is and who was and who is to come, the Almighty" (Revelation 1:8). So, the voice from the throne belonged to Jesus, the risen, almighty Lord, who is eternal. He declared in Revelation 21:6: "It is done!" Referring to His spoken words about creating all things new, Jesus affirms that what He began has come to pass. He always finishes what He begins (Philippians 1:6).Those who thirst for spiritual satisfaction find that Jesus gives it without charge. His grace saves and satisfies the thirsting soul. During His earthly ministry, Jesus told a spiritually thirsty woman at Jacob's well: "Whoever drinks of the water that I will give him will never be thirsty again. The water that I will give him will become in him a spring of water welling up to eternal life" (John 4:14). Also, the fourth beatitude promises that those who hunger and thirst for righteousness will be satisfied (Matthew 5:6). That promise is fulfilled entirely and completely in eternity.