14:8 living waters. Emerging from a great aquifer beneath Jerusalem, and released by the earthquake, two great rivers will flow, one to the Dead Sea, one to the Mediterranean. See the more detailed account of these waters in Ezekiel 47:1-12. There were similar rivers in Eden, flowing out from God, and there will also be such in the New Jerusalem (Genesis 2:10-14; Revelation 22:1-2). All of these are literal models of the great spiritual prototype, the living water from Christ Himself (Isaiah 44:3; John 4:14; 7:37-39; Revelation 22:17).
14:9 one LORD. No more will men worship the creation rather than the Creator, by way of thousands of pantheistic, polytheistic delusions. All will know and obey the one God, our Creator/Savior, through Jesus Christ (Philippians 2:9-11; Ephesians 1:21; etc.).