A "field" in the Bible usually represents the Lord's church, and more specifically the desire for good within the church. It's where good things start, take root, and grow. When you have a desire to be a good person and to do good things, the natural first questions are "What does that mean?", "What should I do?", "What can I do?". You look for ideas, concepts, direction. Once you figure out something you want to do or a change you want to make in yourself, you seek specific knowledge. If you want to volunteer at a food pantry, say, you'd need to know whom to call, when they need help, where to go, what to bring. Armed with that knowhow, you're ready to get to work. That process could be compared to food production. You start with a field -- which is that desire to be good. Then you plant seeds -- those ideas and concepts. Those seeds sprout into plants -- the specific facts and knowledge needed for the task (easily seen in the food pantry example, but also true with deeper tasks like "being more tolerant of my co-workers" or "taking more time for prayer," or "consciously being a more loving spouse"). Finally, those plants produce food -- the actual good thing that you go and do. The Writings also say that in a number of cases a "field" represents the doctrine, or teachings, of the church. This sounds markedly different. The desire for good is emotional, a drive, a wanting; doctrine is a set of ideas. But for a church to be true, its doctrine must be centered on a desire for good, and must lead people toward doing what is good. So sound doctrine is actually closely bound up with the desire for good.

649. Verse 7. And when they shall have finished their testimony, signifies in the end of the church, when the Divine of the Lord is no longer acknowledged, and thence there is no longer any good of love or truth of doctrine. This is evident from the signification of "testimony," as being the acknowledgment of the Divine in the Lord, and thence of the good of love and truth of doctrine (of which presently), and from the signification of "to finish it," as being to bring to an end; and as this comes to an end at the end of the church; "to finish" here signifies the end of the church; and as there is then no longer any acknowledgment of the Divine in the Lord, there is therefore no good of love or truth of doctrine.

[2] That this is the signification of "testimony," can be seen from what has been thus far said about "the two witnesses," namely, that by them the good of love and charity and the truth of doctrine and faith are meant, because these are what especially testify concerning the Lord, for they are from the Lord, and are His with man; therefore "their testimony" signifies preaching concerning these. That "testimony" here signifies the acknowledgment of the Divine in the Lord is evident from what follows in Revelation:

That the testimony of Jesus is the spirit of prophecy (Revelation 19:10).

For unless a man acknowledges this from the heart, and believes it from spiritual faith, he can have no ability to receive the good of love or the truth of doctrine.

[3] At the end of the church indeed the Lord is preached, and from doctrine a Divine is also attributed to Him like the Divine of the Father; yet scarcely anyone thinks of His Divine, for the reason that they place it above or outside of His Human; therefore they do not look to the Lord when they look to His Divine, but to the Father as to another, and yet the Divine that is called the Father is in the Lord, as He Himself teaches in John 10:30, 38; 14:7. For this reason men think of the Lord in the same way as they think of a common man, and from that thought their faith flows, however much they may say with the lips that they believe in His Divine. Let anyone explore, if he can, the idea of his thought about the Lord, whether it be not such. But when it is such man cannot be conjoined to the Lord by faith and love, nor through conjunction receive any good of love or truth of faith. This, then, is why there is at the end of the church no acknowledgment of the Lord, that is, of the Divine in the Lord and from the Lord. It is believed that there is an acknowledgment of the Divine of the Lord, because such is the doctrine of the church; but so long as His Divine is separated from His Human, His Divine is yet not acknowledged interiorly but only exteriorly, and to acknowledge exteriorly is to acknowledge with the mouth only and not with the heart, or in speech only and not in faith.

[4] That this is so can be seen from Christians in the other life, where the thoughts of the heart are manifested. When they are permitted to speak from doctrine and from what they have heard from preaching they attribute a Divine to the Lord, and call it their belief; but when their interior thought and faith are explored they have no other idea of the Lord than as of a common man who has no Divine. It is man's interior thought that is the source of his faith; and as such is the thought and consequent faith of man's spirit, there is plainly no acknowledgment of the Divine in the Lord and from the Lord in the Christian world at the end of the church. In other words, there is an external acknowledgment of the Divine of the Lord, but no internal, and an external acknowledgment is of the natural man alone, while internal acknowledgment is of his very spirit; and after death the external acknowledgment is put to sleep, while the internal is the acknowledgment of his spirit. From this it can in some measure be seen how what follows is to be understood, namely, "the beast that cometh up out of the abyss shall overcome and kill the two witnesses," and their "bodies shall be seen upon the street of the city that is called Sodom and Egypt," and afterwards that "the spirit of life entered into them."