“The greatest mistake you can make in this life is to continually fear you will make one.”
But seriously :
The greatest mistake you can make in this life is . . .
Disrespect others & Disrespect their opinions & Disrespect their beliefs,
I think you must go further, for example:
“The greatest mistake you can make in this life is to continually fear you will make one.” any things.
The greatest mistake you can make in this life is . . .
To sleep in the same place with someone ate alot before sleeping :D