除非你决定如此，否则你不会被困在原地。

建筑之美在于其必然性。

数学是逻辑思想的诗歌。

模型的好坏取决于其假设。

True leadership means making tough decisions for the right reasons.

The advantages found in history seem to be of three kinds， as they result either from the mere situation of the climate and country or from the form of government and of the character of the people， or from those finer principles and morals， which may be called the recommendations of philosophy.