Many Joyce scholars regard Episode 1: Telemachus and Episode 4: Calypso as deliberate structural reflections of one another. They are the twin doorways of the novel — one opening on a young artist, the other on an ordinary man.
After spending the first three episodes — the Telemachiad — inside Stephen's restless mind, Joyce does something audacious: he rewinds the narrative clock to the same early morning and starts again with Leopold Bloom. The second beginning quietly repeats the first, theme for theme and symbol for symbol.
Read side by side, the chapters reveal a single architecture. Stephen lacks a father; Bloom lacks a son. The whole emotional structure of Ulysses grows out of those corresponding voids.