I was re-reading Randy Alcorn's book Heaven and thought that this quote from it might be profitable to add to this thread:

"I believe there's one central explanation for why so many of God's children have such a vague, negative, and uninspired view of Heaven: the work of Satan.

Jesus said of the devil, "When he lies, he speaks his native language, for he is a liar and the father of lies" (John 8:44). Some of Satan's favorite lies are about Heaven. Revelation 13:6 tells us the satanic beast "opened his mouth to blaspheme God, and to slander his name and his dwelling place and those who live in heaven." Our enemy slanders three things: God's person, God's people, and God's place—namely, Heaven.

After being forcibly evicted from Heaven (Isaiah 14:12-15), the devil became bitter not only toward God, but toward mankind and toward Heaven itself, the place that was no longer his. It must be maddening for him that we're now entitled to the home he was kicked out of. What better way for the devil and his demons to attack us than to whisper lies about the very place on which God tells us to set our hearts and minds?

Satan need not convince us that Heaven doesn't exist. He need only convince us that Heaven is a place of boring, unearthly existence. If we believe that lie, we'll be robbed of our joy and anticipation, we'll set our minds on this life and not the next, and we won't be motivated to share our faith. Why should we share the "good news" that people can spend eternity in a boring, ghostly place that even we're not looking forward to?

...

Satan hates the New Heaven and the New Earth as much as a deposed dictator hates the new nation and new government that replaces his. Satan cannot stop Christ's redemptive work, but he can keep us from seeing the breadth and depth of redemption that extends to the earth and beyond. He cannot keep Christ from defeating him, but he can persuade us that Christ's victory is only partial, that God will abandon his original plan for mankind and the earth.
Because Satan hates us, he's determined to rob us of the joy we'd have if we believed what God tells us about the magnificent world to come.
"

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Our blessed hope:
"See what kind of love the Father has given to us, that we should be called children of God; and so we are. The reason why the world does not know us is that it did not know him. Beloved, we are God's children now, and what we will be has not yet appeared; but we know that when he appears we shall be like him, because we shall see him as he is. And everyone who thus hopes in him purifies himself as he is pure."

(1 John 3:1-3, ESV)