When God speaks to us about our giving (i.e., about our contribution in worship to Him, in order to support the work of the church), He always emphasizes that it is to be done according to one’s ability to give. We are to give as we “may prosper” (1 Cor. 16:2). There is to be a direct proportion between how much we prosper and 
how much we give. Our giving is accepted by God “according to what one has, and not according to what he does not have” (2 Cor. 8:12). Each is to give “according to his ability” to give (Acts 11:29; cf. 2 Cor. 8:2-3). The Old Testament principle stated it this way: “…they shall not appear before the Lord empty-handed. Every man shall give as he is able, according to the blessing of the Lord your God which He has given you” (Deut. 16:16-17). “As the Lord blesses you” is the measure for giving.
So, here’s the question: Are you giving according to your ability to give, according to how the Lord has blessed you? Does your giving correspond to your prospering? The Lord knows how much you can give and how much you are giving. Is there a big difference?