## Have I not written for you ##

The answer to this question is "yes." AT: "I have written for you" (See: [[rc://en/ta/man/translate/figs-rquestion]])

## instruction and knowledge ##

These two words mean basically the same thing and emphasize the content of the thirty sayings. (See: [[rc://en/ta/man/translate/figs-doublet]])

## to those who sent you ##

This implies that the person listening is or will be a messenger, a function similar to a diplomat or a negociator.