Better to shut the fuck up and look a fool than open your mouth and confirm it.
It only works if people around you are reasonable.
I would recommend reading the room first before doing that, because what might happen is that the Fool will never shut the fuck up and people will eat it up.
Trust no one.
I'm the opposite, Trust everyone unless proven otherwise, the price of my forgiveness will be very steep.
As for my own piece of wisdom: No one know what the fuck they are doing, least of all the people in charge.