Statistics are like clay of which you can make a good or devil as you please explain?

It means that you can take a load of statistics and make all sorts of conclusions you want for it to back up what you want to find. You can ignore certain things, while present other things that support what you want to say. An example is where 52% of children from the south of the city have passed an exam, while 54.3% of the children in the north have passed an exam. So a politician may say that children in the north are more intelligent. In actual fact, the sample size may only be around 17, while the test is only aimed at a small age group, so the politician is wrong to make such a sweeping statement. It's a case of interpreting the statistics how you like, it can be easily done, but may be wrong to do so.