2 Cor. 8:7-9 (NIV)

7But just as you excel in everything -- in faith, in speech, in knowledge, in complete earnestness and in your love for us -- see that you also excel in this grace of giving.

 8I am not commanding you, but I want to test the sincerity of your love by comparing it with the earnestness of others.  9For you know the grace of our Lord Jesus Christ, that though he was rich, yet for your sakes he became poor, so that you through his poverty might become rich.