Difference

I might be wrong yesterday.

It was equally possible that the Chen's couple and Wang were genuinely unselfish politicians in those days - and the heroes became corrupted only after they rose to a high position. Who can tell ?

Well, if there is no objective means to distinguish an ambitious tyrant under incubation from a great democracy fighter that (are prone to) have mutation later, they are all but one type of people.

"But their minds are different !" You may argue.

You may be right, but no body could tell what's in their mind. (In fact I always want to have someone who could tell what's in my mind - I don't seem to know.) We could only judge people by what they do - not by guessing what possible electric current goes between their neuron, nor what vibration wave comes out from their vocal cord.

And we always remember the most critical voice on the radio would convert to a die-hard royalist once he became the backbencher.