The masthead I believe. He's comparing himself to a part of a ship. He compares his skin to the wood.
Answer: Saint Paul was able to read and write in both the ancient Aramaic language, as well as Greek and Latin, a part of his education that was given to him thanks to his membership to the Pharisees. It gave him access to the Gentiles once he converted and allowed him to form several Christian settlements all over Asia Minor.
An equinox happens only twice a year.
