Studio
18 They shall also gird themselves with sackcloth, and horror shall cover them; and shame shall be upon all faces, and baldness upon all their heads.
54 That thou mayest bear thy own shame, and mayest be confounded in all that thou hast done, in that thou art a comfort to them.
'Perpetual' in the literal sense, means to the end of one's life, after death, and eternity.
(Riferimenti: Arcana Coelestia 8991)