No one understands the scripture without the Holy Spirit ... the Holy Spirit was not yet given.
The Holy Spirit preached the gospel
“Now when all the people were baptized, it came to pass, that
Jesus also being baptized, and praying,
the heaven was opened, and the Holy Ghost descended in a bodily shape like a dove upon him, and a voice came from heaven, which said,
Thou art my beloved Son; in thee I am well pleased.”
Luke 3:21-22 KJV
“
He that cometh from above is above all: he that is of the earth is earthly, and speaketh of the earth:
he that cometh from heaven is above all. And what he hath seen and heard, that
he testifieth; and no man receiveth his testimony.
He that hath received his testimony hath set to his seal that God is true.
For
he whom God hath sent speaketh the words of God: for God giveth not the Spirit by measure unto him.”
John 3:31