數(shù)學不僅僅是關(guān)于數(shù)字、方程、計算或算法：它是關(guān)于理解的。
在一個國家中，一個公民的自由是對其他人的威脅。
"The past is always present in the present."
"Memory can make a thing seem to have been much more than it was."