Here litotes is used to emphasize that Jesus will keep everyone that God gives to him. Alternate translation: "I should keep all of them" (See: [[rc://en/ta/man/jit/figs-litotes]])
Here to raise up is an idiom for causing someone who has died to become alive again. Alternate translation: "will cause them to live again" (See: [[rc://en/ta/man/jit/figs-idiom]])