Last but not least, it is often said that one can only achieve something substantial in a certain area by applying oneself to it.

最后，人们经常说，只有全身投入，人们才能在某一领域崭露头角。

But a long line of Methodist preachers behind me has left the evil thought in the blood of my brain that the more difficult a job, the more certainly one must apply oneself to its mastering.

但是我身后的一长串卫理公会传教士在我脑中留下了一个邪恶的想法，即一项工作越困难，一个人就越肯定必须全心全意地掌握它。