Catholic Answers Senior Apologist Jimmy Akin explains what Rev 21:1 means when it says there will be "a new heaven and a new earth."
Jimmy Akin was born in Texas and grew up nominally Protestant. At age 20 he experienced a profound conversion to Christ. Planning on becoming a Protestant pastor or seminary professor, Jimmy started an intensive study of the Bible, but the more he immersed himself in Scripture, the more he found...
"Love men, slay error; without pride be bold in the truth, without cruelty fight for the truth."
~ Augustine of Hippo, prescribing sincerest love for the erring with keen repugnance for the error to which they cling, anticipating the very definition of true civic tolerance, as detailed in the article Religious Toleration.