A Quote by Albert Einstein on success, comfort zone, and self development

"It's not that I'm so smart, it's just that I stay with problems longer."

- Albert Einstein

Comment:-
So, as we need to stay with a problem (or Goal) long enough to turn it in to Successful Result, might as well choose a Big one that's worth staying with.

Those who staying with the right problem,(eg. learn a new skill, etc.), long enough will be rewarded.

Those who staying with the wrong reward,(eg. stay in comfort zone, etc.), long enough will get problem.