If I had supernatural power, I could take you up to the Pure Land of Amitabha Buddha for a visit, or to the Kingdom of God if you are a Christian. I am sure that everything would be nice and clean there, with beautiful scenery. But once you were there, how would your footsteps be? Can you be sure that your footprints on the Pure Land would not show traces of worries and sorrows you carried from this samsaric, worldly life?
If you take your worries and sorrows along with you and set them on the Pure Land, you would defile the Pure Land and make it much less pure! To deserve the Pure Land, you must be able to take peaceful and anxiety-free steps right here on this samsaric ground.