The Son of Man as messianic title
Here’s what it means
Jesus uses “the Son of Man” as a title joining true humanity, authority, suffering, resurrection, and Daniel’s heavenly ruler.
Why the Bible says it this way
The writer uses vivid or unusual wording to make the point clear and memorable.
A helpful detail: The title should not be reduced to a mere synonym for “I.” Its meaning grows from Jesus’ sayings and Daniel 7.