Arcana Coelestia #4001
4001. 'And black among the lambs' means the first state of innocence. This is clear from the meaning of 'black' as the proprium, and from the meaning of 'a lamb' as innocence, dealt with just above in 3994. The reason why 'black among the lambs' at this point means the first state of innocence is that the proprium of a person who is being regenerated rules at first, for he imagines that he does good from his proprium, and also, so that he can be granted a heavenly proprium, he must do it as if from his proprium, see 1712, 1937, 1947, 2882, 2883, 2891. This is why 'black among the lambs' here means the first state of innocence.
Arcana Coelestia #2882
2882. The main reason why a person believes that he has no freedom is his awareness that he, of himself, is incapable of doing what is good and thinking what is true. But let him not also believe that anyone ever has or has had of himself any freedom to think what is true and to do what is good. Not even those people had that freedom of themselves who, because they were utterly blameless, were called the image and likeness of God. But all freedom to think the truth of faith and to do a good deed of charity flows in from the Lord. The Lord is Good itself and Truth itself, and consequently their fountainhead. All angels possess that freedom and indeed the perception itself that all that has been said here is so. Inmost angels perceive how much comes from the Lord and how much from themselves, but that insofar as it comes from the Lord they know happiness and insofar as it comes from themselves they do not.