6065. 'Their flocks and their herds' means forms of the good of truth, interior and exterior ones. This is clear from the meaning of 'flocks' as interior forms of good, and of 'herds' as exterior forms of good, both dealt with in 5913, 6048. The reason forms of the good of truth are what is meant is that spiritual good, which is represented by 'Israel', is the good of truth, 4598. Forms of good as they exist in heaven or with man have two different origins; that is to say, they originate in the will or in the understanding. Good that originated in the will existed among the most ancient people who belonged to the celestial Church, whereas good that originated in the understanding existed among the ancients who belonged to the spiritual Church. The first kind of good exists with those in the inmost or third heaven, the second kind with those in the middle or second heaven. What the difference is between them, and the nature of that difference, has been stated many times in explanations. Good that has its origin in the will is good from which truth is derived, whereas good that has its origin in the understanding is good which is a product of truth, that is, it is the good of truth. Essentially this good is nothing else than truth put into practice.