<p>4:15 <i>For all things are for your sakes, that the grace may be multiplied through many</i>- God's saving grace meant that &quot;many&quot; preachers like Paul were sharing this grace to others; and the result would be thanksgiving which glorified God. The terms used in this verse are going to be later used by Paul about the gift or grace of giving to his Jerusalem Poor Fund. He believed that this giving would result in much thanks, to God's glory (2 Cor. 8:7; 9:8,12). The grace given each of us in salvation ought to be reflected in practical giving to the poor, so that our praise for God's giving to us translates into the praise of the recipients towards God. As Paul felt he could orchestrate even the salvation of the Corinthians (see on :12), so he felt he could arrange the glory of God through his elaborate Jerusalem Poor Fund project. But there is no evidence he gathered very much support for it, nor that it was accepted by the Jerusalem poor, nor that it ever elicited much thanks to God. Likewise it cannot be that Paul alone could be the saviour of those who &quot;had not the knowledge of God&quot; and who had turned away from God's glory in Christ.</p><p><i>Causing thanksgiving to abound to the glory of God</i>- AV &quot;to redound&quot;, Gk. &lsquo;to surge back&rsquo;. God&rsquo;s grace shown to us surges back like the tide in good works to others; see on 4:1. The same word is used about the grace / giving to the Jerusalem poor abounding to God's glory through all the thanksgiving which Paul imagined the project would elicit (2 Cor. 9:12 s.w.).</p>