The most effective way Joe has found to grow intellectual intelligence isn’t brain teasers or math — it’s learning to see the truth in every point of view and the falseness in every point of view. School trains us to find the one right answer, but real intelligence understands what’s right and wrong about every answer.

“What’s really important is to understand what’s right about every answer and what’s wrong about every answer.”

Black-and-white thinking caps your solution sets. The moment you declare something simply wrong, you lose access to all the ways it might work if it were partly right. Science itself advances this way — what was “wrong” one year becomes “right” the next.

He applies it to the critical voice in the head. “I’m bad for smoking” feels true — yes, smoking harms you — but it’s also finding a real moment of relaxation, and quitting might just push the behavior elsewhere. Holding both sides reveals more options rather than fewer.

“When you say something’s wrong, then you can’t solve the problem in all the ways that it might work if it’s right.”

Source