4803. It is worthy of mention, being wholly unknown in the world, that the states of good spirits and of angels are continually changing and perfecting, and that they are thus raised into the interiors of the province in which they are, and so into nobler functions; for in heaven there is a continual purification, and so to speak new creation; but still the case is such that no angel can possibly attain absolute perfection even to eternity. The Lord alone is perfect; in Him and from Him is all perfection. They who correspond to the mouth are continually desiring to speak, for in speaking they find their greatest pleasure. When they are being perfected they are reduced to this - that they do not speak anything but what is of service to their companions, to the common good, to heaven, and to the Lord. The delight of so speaking is enhanced with them in the degree of the loss of the desire to regard themselves in their speech, and to seek wisdom from their own.