1 Corinthians 16:15

Now. beseech you, brethren (ye know the house of Stephanas, that it is the firstfruits of Achaia, and that they have set themselves to minister unto the saints),

'I beseech you' -'I urge you' (NASV)

'house of Stephanas' -'household' (NASV)

'firstfruits of Achaia' -the first converts in the whole of Greece, and not only Corinth. Which makes some think that they were probably converted in Athens.

'they have set themselves to minister unto the saints' -'put themselves in line..they made. regular business of it' (Lenski p. 776) 'Devoted themselves' (NASV)

'set themselves' -personal initiative and voluntary service. Nobody had to push this family to "find something to do". They sought out opportunities to serve the Christians in Corinth. When this letter was being written, Stephanas himself had come to Ephesus to assist Paul. (1 Corinthians 16:17)

'Here are people who in self-dedication took it upon themselves to minister to others in Corinth.' (Fee pp. 829-830)

'minister' -the precise areas they served in, and what they actually did aren't given.