The meaning here is that the writer is not worried about his enemies because he is an honored guest of the Lord and therefore protected from harm. Alternate translation: "despite the presence of my enemies"
Here a cup of wine that overflows represents many blessings. Alternate translation: "You fill my cup so much that it overflows" or "You give me many blessings" (See: [[rc://en/ta/man/translate/figs-idiom]])