2Co 8:13-14, 13 For I do not mean that others should be eased and you burdened, but that as a matter of fairness 14 your abundance at the present time should supply their need, so that their abundance may supply your need, that there may be fairness.
There are different abilities of givers at various times as noted by the apostle. At this time, the congregation at Corinth was rich and wealthy and had a great abundance of the things of this world. They were in a great position to accomplish all the more, particularly to different churches that had need. This was their period of plenty, however, there was going to come a period they would be in need of help as well.
It is therefore the will of God that we “Bear one another’s burdens, and so fulfill the law of Christ“(Gal 6:2) that there be some sort of equality in sacrifice, not an absolute equality indeed. For the weight ought not to lie excessively and overwhelmingly on a few, while others are wholly eased. As we have observed, the Macedonian’s were not well able, but they still acted according to their abilities and much more. The disciples as well were not rich, but they still acted “So the disciples determined, every one according to his ability, to send relief to the brothers living in Judea”. (Act 11:29). However little or large the collection was, it partly eased the burden of others.