And if you take it literally you will certainly never understand it. It is apocalyptic and not intended to be taken literally. As it says itself. it was truth communicated by signs.
signify G4591
σημαίνω sēmaínō, say-mah'-ee-no; from σῆμα sēma (a mark; of uncertain derivation);
to indicate:—signify. to make known
Rev 1:1
The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and he sent and signified G4591 it by his angel unto his servant John
Jhn 12:33
This he said, signifying G4591 what death he should die.
Jhn 18:32
That the saying of Jesus might be fulfilled, which he spake, signifying G4591 what death he should die.
Jhn 21:19
This spake he, signifying G4591 by what death he should glorify God.
And when he had spoken this, he saith unto him, Follow me.
Act 11:28
And there stood up one of them named Agabus, and signified G4591 by the Spirit that there should be great dearth throughout all the world: which came to pass in the days of Claudius Caesar.
Act 25:27
For it seemeth to me unreasonable to send a prisoner, and not withal to signify G4591 the crimes laid against him.