Paul asks a question so that the Corinthians will think of what he is saying without him having to say it. Here "we" refers to Paul and Barnabas. AT: "Others exercised ... you, so you know without me telling you that we have this right even more." (See: [[rc://en/ta/man/translate/figs-exclusive]] and [[rc://en/ta/man/translate/figs-rquestion]])
# Do you not know that those who serve in the temple get their food from the temple?
Paul is reminding the Corinthians of what they know so he can add new information. AT: "I want to remind you that those who serve in the temple get their food from the temple." (See: [[rc://en/ta/man/translate/figs-rquestion]])
# Do you not know that those who serve at the altar share in what is offered on the altar?
Paul is reminding the Corinthians of what they know so he can add new information. AT: "I want to remind you that those who serve at the altar get some of the foods and meat that people offer on the altar." (See: [[rc://en/ta/man/translate/figs-rquestion]])
The words "the gospel" here are a metonym for 1) the people to whom they tell the gospel, "receive their food and other things they need from those to whom they teach the good news," or 2) the result of working to tell the gospel, "receive their food and other things they need because they work to tell the good news." (See: [[rc://en/ta/man/translate/figs-metonymy]])