<p>16:4 <i>Who for my life laid down their own necks</i><i>. To whom not only I give thanks, but also all the churches of the Gentiles</i><i>- </i>This suggests they at some point (perhaps in Ephesus) had been willing to take Paul's death sentence. According to Deissmann, this Greek term refers to the possibility of being murdered in the place of someone condemned to death. But 1 Clement 55 speaks of Christians serving prison terms for each other: &ldquo;We know many among ourselves who have given themselves up to bonds, in order that they might ransom others&rdquo;. They did this, presumably, because they believed Paul's freedom would result in the Gospel spreading further than it would by their own continued freedom. Therefore Paul goes on to say that &quot;the churches of the Gentiles&quot; were grateful for this. The context in Romans 15 is of Paul's ministry to the Gentiles, and his desire that the Romans participate fully in it. So it would appropriate to mention the great example of Priscilla and Aquilla in this matter. We likewise may sacrifice money or even more to enable another to do work which we know we cannot do so well. If indeed they served a prison sentence on Paul's behalf, this might explain why they were back in Rome. Although :5 says that they had a house church.</p>