Well, what they DID know (and understand correctly) was the message that Jesus gave them to share (Matt10:7), "As ye go, preach, saying, The kingdom
of the heaven
s is at hand."
[this involves Jesus' tangible Personal Presence]
ADDING THIS:
[quoting]
Three Spheres of Christ's Glory - Andrew Miller [source: Bible Truth Publishers]
"In 1 Cor. 10:32 the apostle furnishes us with a classification of mankind which greatly helps not only to the understanding of prophecy but to the whole word of God. "Give none offense, neither to the Jews, nor to the Gentiles, nor to the church of God." Here we have the three great spheres in which the glory of Christ is displayed.
As it respects man's condition before God in reference to eternity, there are but two classes, the saved and unsaved-those who have been really born again, and those who are still in nature's darkness and unbelief. But with regard to God's government of the world there are three classes-Jews, Gentiles, and the church; and no one can rightly divide the word of God who overlooks this division.
To trace through scripture God's purpose concerning these three classes is the surest way to ascertain the order of God's dispensations, and the harmony of all portions of the holy scriptures with each other. At present we can only refer to a few passages of scripture by way of introducing the reader to this threefold purpose of God."
https://bibletruthpublishers.com/th...f-their-origin-progress-and-testimony/la58744
[end quoting; bold and underline mine--with certain caveats to remainder of article]