In his book, "The Treasure Principle" Randy Alcorn says that the greatest deterrent to giving is the illusion that Earth is our home. He tells the following story.
Suppose your home is in France and you're visiting America for three months, living in a hotel. You're told that you can't bring anything back to France on your flight home. But you can earn money and mail deposits to your bank in France.
Would you fill your hotel room with expensive furniture and wall hangings? Of course not. You'd send your money where your home is. You would spend only what you needed on the temporary residence, sending your treasures ahead so they'd be waiting for you when you got home.
… Our bridegroom, the carpenter, is building a place for us in heaven. Everything we send on ahead will be waiting there for us. It's our gift to him, but in his generosity, he will give those treasures back to us.
Randy Alcorn. The Treasure Principle: Discovering the secret of joyful giving. Life Change Books, Multinoma Publishers: 2001. Page 45-46