This is an ancient poem about the power of love. It tells the story of a phoenix and a turtle dove who are deeply in love, but must part ways due to the pressures of society. The poem explores the themes of loyalty, faithfulness, and the strength of true love.
From Wikipedia
The Phoenix and the Turtle is an allegorical poem by William Shakespeare, first published in 1601 as a supplement to a longer work, Love's Martyr, by Robert Chester. The poem, which has been called "the first great published metaphysical poem", has many conflicting interpretations. The title "The Phoenix and the Turtle" is a conventional label. As published, the poem was untitled. The title names two birds: the mythological phoenix and the turtle dove.