This first of the set of verses begins with the fact that those who teach the Word of God are to be supported materially by the ones who are taught the Word of God. Probably a bit different in Bible times as there were no seminaries or degrees or anything like that. In Job 32:22 he said, “I know not to give flattering titles; in so doing my maker would soon take me away.” Now back to my original thought. They didn’t have a New Testament put together. The Church was built on the teachings of Apostles and Prophets. Now we have this beautiful book called the New Testament, simple enough that I with only a high school education can understand it and preach it. Why do I need to call myself anything but a born again Christian, indwelt by this Holy Spirit of God?
Next, we can come to sowing and reaping. Really Paul is talking about material value such as money given to teachers. When I was at Grace & Truth ministry we had one farmer give a side of beef for all the workers. That can be sowing and we in turn sow the Word of God. We will all reap together. Now we can sow to the flesh. We will reap that too, those who do that. Paul calls that reaping corruption.
We are not to be weary in well doing. A man accepted Christ in the jail yesterday (from where I am writing), but what happens if no one does? Do I keep on preaching waiting until the judgement seat of Christ to find out whether He says well done good and faithful servant. I am waiting for that time.