10624. Upon the thirds and upon the fourths. That this signifies the condemnation of falsities and of the derivative evils, is evident from the signification of "sons," as being the falsities of evil (of which just above, n. 10623). The reason why it is said "upon the thirds and upon the fourths," is that "three" is predicated of truths or falsities, and "four" is predicated of goods or evils. For in the Word all numbers signify things, some numbers belonging to the spiritual class, and some to the celestial class. The numbers three, six, and twelve belong to the spiritual class, and the numbers two, four, and eight to the celestial class. The numbers which belong to the spiritual class are predicated of truths or of falsities; and those which belong to the celestial class are predicated of goods or of evils. By "three" is also signified all truth in the complex; and by "four," all good in the complex. From this it is that by "sons the thirds and the fourths" are signified falsities and the derivative evils. But this sense of these words is the celestial sense, because it arises from the fact that they are predicated of these falsities and evils. (What evils and the derivative falsities are, and what falsities and the derivative evils are, may be seen at the places cited in n. 10109.) Here also something shall be said about evils and the derivative falsities, and about falsities and the derivative evils. Evils are the sources of all falsities, because falsities are what confirm evils, and evils and falsities act in a man as do the will and the understanding, for what a man wishes to do he also wishes to understand, because it is by means of the understanding that he forms his evil before himself in thought, and before others in speech. From this it is evident what evil and the derivative falsity are, that is, the falsity of evil. But the evil of falsity is when man has confirmed evil with himself, and has concluded that it is not evil, and consequently does it. In this case he does evil from falsity. For example, he who has confirmed with himself that adulteries are not evils, and from this does them, is in the evil of falsity, because he does them from a false principle. The evils of falsity are chiefly to be found in religious matters, for from the falsities of doctrine a man persuades himself that a thing is good, which nevertheless is evil; and sometimes that a thing is evil, which nevertheless is good.