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- The outstanding feature of today’s march is that we have seen new land to the South never seen by human eyes before great snow clad heights [which] we did not see on our journey South on the last Expedition for we were too close to the land or rather foothills and now at the great distance we are out they can plainly be seen.
- Heart of the Antarctic (1908-11-22)
- That was all of tangible things; but in memories we were rich. We had pierced the veneer of outside things. We had "suffered, starved and triumphed, groveled down yet grasped at glory, grown bigger in the bigness of the whole. We had seen God in His splendours, heard the text that Nature renders." We had reached the naked soul of man.
- South (1919). In this extract, Shackleton was paraphrasing the poem "The Call of the Wild" by Robert Service, published in 1907.
- Optimism is true moral courage.
- Quoted in Hussey, L. D. A, South with Shackleton (1949).