God the Father and God the Son know each other unlike anyone else knows them. "Father" is an important title for God. (See: [[rc://en/ta/man/translate/guidelines-sonofgodprinciples]])
This is a mild way for Jesus to say that he will die to protect his sheep. AT: "I die for the sheep" (See: [[rc://en/ta/man/translate/figs-euphemism]])
Here "flock" and "shepherd" are metaphors. All of Jesus's followers, Jews and non-Jews, will be like one flock of sheep. He will be like a shepherd who cares for all of them. (See: [[rc://en/ta/man/translate/figs-metaphor]])