Brief recap: Judgers tend to decide quickly, Perceivers tend to leave options open. More specifically, if a J is presented with a bunch of possibilities, he will take one (or a few) of them to look at and decide between these few, and wouldn't delve too deep into the possibilities he's lost by deciding.
A P tends to look at all of them (or at least a lot more than the J) and doesn't want to decide because there's so much to lose... until the P realizes that non-decision will lose all.
Our J looks back to the past with confidence. He's made the right decision. Only being proven wrong will unsettle him.
The P doesn't want to look back to the past, because there are all the lost possibilities. Instead he looks to the future... where all the possibilities are still there, none of them destroyed by a decision.
I guess this is even more true for SJs and NPs. The Ns tend to see possibilities, the Ss reality.
What do you think?