Just some Zufällig quote SM sagte in interviews, oder wrote in the Saga.

“… Alice and Jasper's is the most…mystical. They just ARE together, and have been from before they even met. They are not complete without each other–and never were. That's what makes them different from the other couples, the "never were." They were already not-whole before they met, waiting for each other."
-Stephenie Meyer on Alice and Jasper

"Secondly, he's really mostly doing this for Alice. Alice is Jasper's entire life. She is the most important thing in the universe to him, and he would do absolutely anything for...