书是一份永远不会失去价值的宝藏。

【译文】 孔子说：“不在那个位置上，就不要想那个位置上的事。”

Those of us who have been fortunate have a duty to give back.Whether one gives a lot as one goes along as I do, or a little and then a lot (when one dies) as Warren does, is a matter of personal preference.

The study of mathematics is a constant dialogue between the concrete and the abstract.