What do you mean by impure motives?

Impure motivation means that someone has done something, but his starting point is not as simple as he appears. In fact, there are other goals behind him. Generally speaking, the motive we are talking about is impure, just the purpose he wants to achieve behind, and some bad purposes are bad, which is equivalent to the same truth as derogatory words. Generally speaking, only those who have a deep mind or have a long plan will have such impure motives, otherwise we ordinary people will not bother to think of various ways to do all kinds of things that calculate others.