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.

8562. 'And there was no water for the people to drink' means a lack of truth and consequently of refreshment. This is clear from the meaning of 'water' as the truth of faith, dealt with in 2702, 3058, 3424, 4976, 5668; and from the meaning of 'drinking' as receiving instruction in the truths of faith and accepting them, dealt with in 3069, 3772, 4017, 4018, at this point being refreshed, because just as water and drink refresh a person's natural life, so truths and cognitions of truth refresh his spiritual life. For one whose life is spiritual desires to sustain that life with such things as are called heavenly food and drink, which are the forms of good and the truths of faith, even as one whose life is natural desires to sustain this with such things as constitute natural food and drink.

[2] The reason why the subject now is a temptation having to do with truth is that the subject immediately before was a temptation which had to do with good, after which temptation the people received the manna, by which good is meant. When the Lord imparts good to someone that person comes to have a desire for truth, and this desire is aroused according to the lack of it; for good craves truth continually. Every genuine affection for truth springs from good. The situation is as it is with food. Without drink food is unable to supply nourishment to natural life; furthermore food creates a craving for drink, in order that, when combined with it, it may serve its purpose. This then is the reason why a temptation having to do with truth comes immediately after a temptation having to do with good. Temptation attacks what a person loves and desires, 4274, 4299.