At the present time, your surplus will meet their need, so that in turn their surplus will meet your need. This way there will be equality.
14. And their abundance It is uncertain, what sort of abundance he means. Some interpret it as meaning, that this had been the case, inasmuch as the Gospel had flowed out to them from the Church at Jerusalem, from which source they had, in their penury, been assisted by their spiritual riches. This, I think, is foreign to Paul’s intention.
In these verses the apostle uses several cogent arguments to stir up the Corinthians to this good work of charity. I. He urges upon them the consideration of their eminence in other gifts and graces, and would have them excel in this of charity also, Co2 8:7. Great address and much holy art are here used by the apostle.
Commenting on 2 Corinthians 8:7-15
As it is written,.... In Exo 16:18 he that gathered much had nothing over, and he that gathered little had no lack; respect is had to the history of the manna, a sort of food God prepared for the Israelites in the wilderness; and which were gathered by them every morning, by some more, by others less; and yet when it came to be measured...