Three short lines carry a quietly sobering idea: life doesn't end with the big, glowing happiness we imagine, but with something smaller and calmer. The speaker says "none of us" reach happiness, so this isn't a personal complaint. It's a claim about everyone, delivered as though it's simply the way things are.
The tone is hard to pin down, and that's what makes it interesting. On one hand, it sounds resigned, even a little sad, as if happiness were a prize we all chase and never win. On the other, "content" isn't a bad word. It suggests peace, acceptance, an ease with what we have. The speaker may be admitting a loss, or may be offering a gentle comfort, or both at once.
"And in the end" gives the lines a feeling of looking back over a whole life. The plain wording and lack of decoration make the thought land softly but stay with you. The mood is reflective, calm, and slightly wistful.