Be charitable before wealth makes thee covetous. - Sir Thomas Browne
To value riches is not to be covetous. They are the gift of God, and, like every gift of his, good in themselves, and capable of a good use. But to overvalue riches, to give them a place in the heart which God did not design them to fill, this is covetousness.
The covetous man is ever in want. - Horace
If you are covetous, you are a prisoner: If you are greedy, you will never be filled. - Idries Shah