Revelation 21:6

The one sitting on the throne resumed speaking. The judgments of the Tribulation (cf. Revelation 16:17) and of the whole old creation stood accomplished (cf. Revelation 21:5). He again referred to Himself as the eternal, sovereign God (Revelation 1:8; cf. Revelation 22:13), the originator and terminator of all things (cf. Isaiah 44:6). His promise of abundant satisfaction for the thirsty is metaphorical, symbolizing His ability to meet the deepest needs of His people (Revelation 7:17; cf. Isaiah 55:1; John 4:13-14; John 7:37-39). Contrast the cup from which the harlot drank (Revelation 17:4; Revelation 18:3). This is an invitation to anyone, including believers, to come to God to receive what is truly satisfying from Him freely. It is a beautiful gospel invitation (cf. Revelation 3:20; Revelation 22:17).