The Marienbad Elegy is a poem written by Johann Wolfgang von Goethe after the refusal of his proposal of marriage. He was 72; she was 17. He was devastated. She never married. You can read it online here. It closes with this:
Leave me here now, my life's companions true!
Leave me alone on rock, in moor and heath;
But courage! open lies the world to you,
The glorious heavens above, the earth beneath;
Observe, investigate, with searching eyes,
And nature will disclose her mysteries.
To me is all, I to myself am lost,
Who the immortals' favourite erst was thought;
They, tempting, sent Pandoras to my cost,
So rich in wealth, with danger far more fraught;
They urged me to those lips, with rapture crowned,
Deserted me, and hurled me to the ground.