People want to dissect his work and question his motives.

人们想剖析他的作品，质疑他的动机。

《柯林斯英汉双解大词典》

Sometimes we work with best of motives and the best of intentions only to be disappointed by the outcome.

有时我们带着最好的动机和最好的意图工作，但就是对结果感到失望。

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So, what are your motives to work in the current position?

那么,你的动机在当前位置的工作吗?

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But there are less altruistic motives at work, too.

FORBES: Magazine Article

"I often question the motives of analysts that work for institutions that are also in the market to broker the shares of companies, " said Mr Yearsley.

BBC: Q & A The role of the City analyst

Since the demise of the brilliant amateurs who sleuthed for their own entertainment at the beginning of the last century, diabolical poisoners with complex motives have been strictly police work.

ECONOMIST: Private detectives