From the song 'Who The Cap Fit' by Bob Marley

Man to man is so unjust, children,
Ya don't know who to trust.
Your worst enemy could be your best friend,
And your best friend your worse enemy.

Some will eat and drink with you,
Then behind them su-su 'pon you.
Only your friend know your secrets,
So only he could reveal it.
And who the cap fit, let them wear it!

https://youtu.be/zOMMWeExwh4

"Be careful what you pretend to be because you are what you pretend to be."
- Kurt Vonnegut

What about those who pretend? Can you spot the pretenders easily?
In the movie 'Let's Be Cops', two young men pretend to be cops.
https://www.youtube.com/watch?v=ExciLtpHp74