The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

Confidence isn't optimism or pessimism, and it's not a character attribute. It's the expectation of a positive outcome.

译文：教导晚辈从小就要有光明磊落的气度和形象，平日还要让晚辈反躬自省，不能没有忧患意识和自我砥砺的修养。赏析：做人一定要胸怀坦荡，正大光明，行事不可用歪门邪道的方式，只有我们做到了，才有资格去教导我们的孩子。人无完人，平日里说话做事，我们都要反思自己的言行是否得当，如果有错误，就要改正，如果做得好，就要勉励自己。

采矿创新不是可选的——它对生存和发展至关重要。