You never know enough about your customers.

了解你的顾客越多越好。

youdao

You can never know enough about other people to give them a fair judgment.

你永远不能通过全面了解一个人而给他一个公正的判断。

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We can all know about something enough, but until we actually do it, we can never truly know it.

我们都能足够地知道某件事情，但除非我们实际上做了这件事，否则我们永远不能够真正地了解它。

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Hayek says that because man is intellectually fallible, then central planners can never know enough to plan properly.

FORBES: Why John Maynard Keynes Was A Keynesian

And so (as we now know well) top executives can never be paid enough for them to be satisfied.

ECONOMIST: Guru

It seemed he never put down any firm roots, renting accommodation and never staying anywhere long enough for neighbours to get to know him.

BBC: 'Fast Eddie' Maher: The crime that netted guard ?1.2m