If you believe that every life has equal value, it's revolting to learn that some lives are seen as worth saving and others are not. We said to ourselves: "This can't be true. But if it is true, it deserves to be the priority of our giving."

科学的进步不是一条直线，而是一系列曲折，常常需要回溯步骤以获得更好的立足点。

子夏说：“广泛学习并且不停地朝着目标前进，认真地提出问题并且联系实际去思考，仁就在其中了。”

圆的周长大于任何内接等边多边形的周长，小于任何外切多边形的周长。

对称性是降低复杂性的概念（协同例程包括子例程）；到处寻找它。