We can't know them
By their religion.
Too much hypocrisy.

We can't know them
By politics.  
It's ever-changing... or not.

We can't know them
By country.
Zillions emigrate and immigrate.

We can't know them
By their clothes.
Emperor or not.

We can't know them
By their words.
Too many equivicators.

We can't know them
By their jobs.
At home or away.

We can't know them
By their family.
Nuclear or extended.

We can't know them
By their deeds.
They say one thing, and do another.

But look to  the roadside.
In the ditches.
By the curb.
In the bins.

Ye shall know them by their garbage.