"To separate yourself to someone" means to "dedicate yourself" to that person. Alternate translation: "he dedicates himself" (See: [[rc://en/ta/man/jit/figs-idiom]])
These two extremes are given to emphasize the entire grape may not be eaten. Alternate translation: "from any part of a grape" (See: [[rc://en/ta/man/jit/figs-merism]])