An empire founded by war has to maintain itself by war.

The more you dwell in the past, the less you prepare for the future.

The mind is divided into parts that sometimes conflict. Like a rider on the back of an elephant, the conscious, reasoning part of the mind has only limited control over the automatic, emotional part.

一个有趣的事实是，大西洋两岸发现了惊人相似的地层构造。