Why does this part of the speech end with “your families are proud of you, and your nation will welcome you”?

It promises that the nation will be grateful for all the work that has to be done:)

Explanation:

postive, comparative, superlative - good, better, best

recall how we defined nouns as words capable of having plurals and possessive endings. adjectives (and their first cousin, the adverb) also have a feature that distinguishes them. they come in three states. first, the raw adjective—in its positive state—merely describes the noun modified; it doesn’t care about how this particular person or thing stacks up against other members of the same noun class