2 Corinthians 9:8
And God [is] able to make all grace abound toward you; that ye, always having all sufficiency in all [things], may abound to every good work:
Note 7 at 2Co 9:8: Notice what this verse did not say. It did not say, "God will make all grace abound toward you." This verse is stating that God is willing and able to supply every need of the cheerful giver, but that doesn't happen automatically. There are conditions to be met. Ga 6:9 says, "And let us not be weary in well doing: for in due season we shall reap, if we faint not."
Note 8 at 2Co 9:8: This verse completely dispels the notion that God only wants to supply our bare necessities. He is able to make all grace (in this instance, His miraculous intervention - see note 5 at Ro 1:5) abound toward us. The word "abound" means "1. To be great in number or amount. 2. To be fully supplied; teem" (American Heritage Dictionary). Whatever our situation, God's grace abounds greater (Ro 5:20).
The Lord desires that we always have all sufficiency in all things. It is not God's will for us to suffer financially (see note 5 at 2Co 8:9).
Note 9 at 2Co 9:8: Those who argue against prosperity invariably cite the examples of those who have gathered riches to consume them upon their own lusts. They use these negative examples to make the point that those who are rich are selfish and corrupt, and then argue against prosperity on the grounds of greed. However, that is not the purpose of God giving us wealth (De 8:18). As this verse states, it is so we may help others.
The purpose of God's prosperity in our lives is so that we can be the blessing to others that we need to be. Before we can be a blessing, we have to be blessed (Ge 12:2). If we are not selfish with our riches, then wealth can be a wonderful thing.
This verse is describing an abundance of blessing to the point that we can abound to every good work. That means that we should never be unable to give to any good cause. Sad to say, that is not the case with most Christians. Satan has robbed us through "poverty thinking" and has caused many good works to go underfunded.
If you are so blessed that you don't have any more needs, then think about others and believe for more abundance so that you can be a blessing to them.