"His lips are red as the rose of his desire." This is an example of

“She said that she would dance with me if I brought her red roses,” cried the young Student; “but in all my garden there is no red rose.”

From her nest in the holm-oak tree the Nightingale heard him, and she looked out through the leaves, and wondered.

“No red rose in all my garden!” he cried, and his beautiful eyes filled with tears. “Ah, on what little things does happiness depend! I have read all that the wise men have written, and all the secrets of philosophy are mine, yet for want of a red rose is my life made wretched.”

“Here at last is a true lover,” said the Nightingale. “Night after night have I sung of him, though I knew him not: night after night have I told his story to the stars, and now I see him. His hair is dark as the hyacinth-blossom, and his lips are red as the rose of his desire; but passion has made his face like pale ivory, and sorrow has set her seal upon his brow.”

“The Prince gives a ball to-morrow night,” murmured the young Student, “and my love will be of the company. If I bring her a red rose she will dance with me till dawn. But there is no red rose in my garden, so I shall sit lonely, and she will pass me by. She will have no heed of me, and my heart will break.”

“Here indeed is the true lover,” said the Nightingale. “What I sing of, he suffers—what is joy to me, to him is pain. Surely Love is a wonderful thing. It is more precious than emeralds, and dearer than fine opals. Pearls and pomegranates cannot buy it, nor is it set forth in the marketplace.”