The phrase is frequently used in lyrics and titles of French romantic ballads, often focusing on the theme of being faithful from the very beginning to the end.
If you are looking for a beautiful, classic expression of devotion, you might use a text like this:
"In the quiet of this moment, I offer you my . I promise to be your anchor in the storm and your light in the dark. From this day until my last breath, my heart remains faithfully yours, bound by a vow that time cannot wither nor distance break." 2. Historical Context (The Artwork)