2Corinthians 9:12-15 For the administration of this service not only supplies the want of the saints, but is abundant also by many thanksgivings unto God; Whiles by the experiment of this ministration they glorify God for your professed subjection unto the gospel of Christ, and for your liberal distribution unto them, and unto all men; And by their prayer for you, which long after you for the exceeding grace of God in you. Thanks be unto God for his unspeakable gift. 

‘Administration of this service’ – the ministering, as in 2Corinthians 9:1.

‘Supplies the want of the saints, but is abundant also by many thanksgivings unto God.’ Four benefits of ministering to saints: It supplies the needs of saints. It causes them to glorify God. It gives proof that the givers are true Christians (9:13; 1Jn. 3:17). It causes prayers of those supplied to go up for their benefactors (9:14).

‘Experiment’ [Greek: dokime] proof, as in 2Corinthians 2:9.

‘Professed subjection unto the gospel of Christ, and for your liberal distribution unto them, and unto all men.’ Glorify God for your subjection or submission to what you profess. You profess to be Christians and that you love your brethren. Your bountifulness is proof of it (1Jn. 3:17).

‘Exceeding grace of God in you.’ The Corinthians had the means with which to promote charity and the heart to do it, but God’s grace was the author of it.

‘Unspeakable gift’ [Greek: anekdiegetos] that which cannot be fully declared. This gift is no doubt God’s gift of His Son (John 4:10; 2Cor. 8:9; cp. Rom. 9:5; 11:33, 36; 1Cor. 15:57; Gal. 1:4; Eph. 3:10; 1Tim. 1:17).

Five reasons why Christ gave Himself: For our sins (Gal. 1:4; Matt. 1:21; 26:28; 1Cor. 15:3; 1Pet. 2:24); that He might deliver us from this present evil world (Gal. 1:4; Tit. 2:14); for His body – that He might sanctify it by the Word (Eph. 5:25-26); to be a ransom for all (1Tim. 2:6); for us, that He might redeem us from all iniquity (Tit. 2:14).