Robert Louis Stevenson’s “The world is so full of a number of things”

In plain words

Two lines, and both are cheerful. The world holds so many things that the speaker is sure we ought all to be as happy as kings. Nothing is achieved or fixed in the poem; the happiness comes from how much there is to be found.

Sit with this line → A few quiet exchanges about what it stirs in you.

Worth knowing

That is the entire poem, not an excerpt. It comes from a book of verses for children by the author of Treasure Island, and the speaker’s “I’m sure” has a child’s certainty about it.