Rev 1:10

1:10 in the Spirit. The Spirit provides John with the special visions and transports him to vantage points to view them (4:2; 17:3; 21:10).

the Lord’s day. Sunday, the Christian day of worship celebrating Christ’s resurrection. The Sunday celebration anticipates the celebration of God’s final victory (19:1–10).

loud voice. The voice of Christ. Loud voices and noises indicate the power and universal relevance of the messages and events (1:15; 4:1, 5; 5:2, 12; 6:1; 7:2, 10; 8:5, 13; 10:3; 11:12, 15, 19; 12:10; 14:7, 9, 15, 18; 19:1, 3, 6, 17).