“To keep through life the posture of the grave,
While others walk and run and dance and leap.”
Sonnets of the Wingless Hours https://archive.org/details/sonnetswingless01leegoog (1894).
Eugene Lee-Hamilton was a late Victorian English poet. His work includes some notable sonnets in the style of Petrarch. He endowed a literary prize administered by Oriel College in Oxford University, where he was a student. The prize is open to students of Oxford and of Cambridge University and continues to this day. Wikipedia

“To keep through life the posture of the grave,
While others walk and run and dance and leap.”
Sonnets of the Wingless Hours https://archive.org/details/sonnetswingless01leegoog (1894).
Sonnet. Sea-shell Murmurs, reported in Bartlett's Familiar Quotations, 10th ed. (1919). Compare: "Gather a shell from the strewn beach / And listen at its lips: they sigh / The same desire and mystery, / The echo of the whole sea's speech", Dante Gabriel Rossetti, The Sea Hints; "I send thee a shell from the ocean-beach; But listen thou well, for my shell hath speech. Hold to thine ear / And plain thou'lt hear / Tales of ships", Charles Henry Webb, With a Nantucket Shell.
From What the Sonnet Is.