Here is a quote from K C Pilai from the book Light From an Eastern Window. I first found this on a great blog found here.
"Lay not up for yourselves treasures upon earth, where moth and rust doth corrupt, and where thieves break through and steal: But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal: For where your treasure is, there will your heart be also." Matthew 6: 19-21
"These verses are not really talking about what to do with your money or jewels, or your stocks and bonds. The common Western interpretation is this: Do not hoard your money and goods while here on earth. Moths and rust will get to your goods, and thieves will break in and steal your money. Rather, give your money to the church, or do good deeds, so that you lay up a store of treasure in heaven.
The Eastern interpretation has a deeper meaning: Treasure = Thoughts. We are urged to keep our thoughts on spiritual things rather than on earthly things. The moth and rust represent fear and worry. If we think about earthly matters, fear and worry will creep in, and we will experience defeat and frustration. The 'thieves' represent 'doubt', which steal our thoughts. But if we think on spiritual matters, there is no doubt, worry, or fear.
Here is the literal translation of the above verses. "Let not your thoughts be centered in material things where fears and worries breed defeat and frustration, and where the doubts break through and steal your thoughts: But let your thoughts be centered in the Spirit, where neither fear nor worry breeds defeat and frustration, and where doubts do not break through and steal your thoughts. For where your thoughts are, there will your heart be also."