Apocalypse Explained #383
383. His name was Death, and Hell followed with him. That this signifies eternal damnation, appears from the signification of name, as denoting the quality of a thing (concerning which see above, n. 102, 148); here, the quality of the Word, [with those] who are in evils and the falsities thence; from the signification of death as denoting damnation (concerning which also see above, n. 186), for spiritual death is nothing else; from the signification of hell, as denoting evil and the falsity thence, because in these and from these hell exists. Furthermore, by hell is signified the same as by death, namely, damnation, but because both are here mentioned, and thus [hell] is distinguished from Death, by hell is signified eternal damnation; for those who come into hell remain there to eternity; therefore it is also said, "and Hell followed with him," to follow with him signifying to abide therein, namely, in damnation to eternity. From these considerations it is evident that by "his name was Death, and Hell followed with him," is signified eternal damnation.
Apocalypse Explained #147
147. And I will give him a white stone. That this signifies wisdom and intelligence is evident from the signification of a white stone, when it is from the Lord, as being reception from Him and influx. And because it denotes reception and influx from the Lord, it also denotes wisdom and intelligence from Him; for those who receive from the Lord, and with whom the Lord inflows, are in wisdom and intelligence. The reason why to give a white stone signifies these things is, that, formerly, in judicial proceedings the votes were given by means of stones; affirmative votes were expressed by white stones, and negative by black stones, hence by a white stone is signified the reception of wisdom and intelligence.