In „Ralph Breaks the Internet” (2018), one character looks for the weak point, the Achilles’ heel.
So does the devil, as far as I know – if a person has a weak point, he’ll insist in there.
Also, a quote:
43 “When an impure spirit comes out of a person, it goes through arid places seeking rest and does not find it. 44 Then it says, ‘I will return to the house I left.’ When it arrives, it finds the house unoccupied, swept clean and put in order. 45 Then it goes and takes with it seven other spirits more wicked than itself, and they go in and live there. And the final condition of that person is worse than the first. That is how it will be with this wicked generation.” (Matthew 12:43-46 NIV)
Most people have one or more weak points. As a paradox, if you admit you can fail, it might show you have strength.