According to one belief, if truth is to be known it willmake itself apparent, so one had best wait insteadof searching for it.

译文：

有一种信念认为真相若要被知晓，它自会现身，因此人们最好是等待而不是去寻找。

点睛：

according to...为整句的状语。if引导的条件状语从句中，is to be known为将来时的被动语态。so引导的结果状语从句中，had best意为“最好”，其后直接跟动词愿形。

考点归纳：与had best含义相近的短语还有：

*had as good/well倒不如，还是…的好

You had as good go there on foot as wait for the bus, since the company is not far away.

公司离这儿不远，你在这儿等车，倒不如走过去的好。

*had better最好还是

We had better finish doing this today, for tomorrow we will have other important things to do.

我们最好还是今天把它干完，因为明天还有其他重要的事情要做。