The marquis had in this family matter, just as he had in politics, brilliant ideas over which he would be enthusiastic for two or three days.

侯爵在这件家事上，就像他在政治上一样，有他会热衷两三天的绝妙主意。

We will not become enthusiastic for the fact, the knowledge,   the absolute truth of the day, but remain always uncertain … In order to make progress, one must leave the door to the unknown ajar.

我们不会对事实、知识、绝对真理充满热情，而是始终保持不确定......为了取得进步，必须让未知的大门半开着。