Albert Barnes Commentary 2 Corinthians 8:14

"but by equality: your abundance [being a supply] at this present time for their want, that their abundance also may become [a supply] for your want; that there may be equality:" — 2 Corinthians 8:14 (ASV)

But by an equality. On just and equal principles.

That now at this time, etc. That at the present time your abundance may be a supply for your wants. The idea is this: Corinth was then able to give liberally, but many of the other churches were not. They were poor, and perhaps persecuted and in affliction. But there might be great reverses in their condition. Corinth might be reduced from its affluence, and might itself become dependent on the aid of others, or might be unable to contribute any considerable amount for the purposes of charity. The members of the church in Corinth, therefore, should so act in their circumstances of prosperity, that others would be disposed to aid them should their condition ever be such as to demand it. And the doctrine here taught is,

1. that the support of the objects of benevolence should be on equal principles. The rich should bear an equal and fair proportion; and if more frequent demands are made on their benefaction than on others, they should not complain.
2. Christians should contribute liberally while they have the means. In the vicissitudes of life, no one can tell how soon he may be unable to contribute, or may even be dependent on the charity of others himself. A change in the commercial world; losses by fire or at sea; want of success in business; loss of health, and the failure of his plans, may soon render him unable to aid the cause of benevolence. While he is prospered, he should embrace every opportunity to do good to all. Some of the most painful regrets which men ever have, arise from the reflection that when prospered they were indisposed to give to benefit others, and when their property is swept away they become unable. God often sweeps away the property which they were indisposed to contribute to aid others, and leaves them to penury and want. Too late they regret that they were not the liberal patrons of the objects of benevolence when they were able to be.

That there may be equality. That all may be just and equal. That no unjust burden should be borne by any one portion of the great family of the redeemed. Every Christian brother should bear his due proportion.