What if?

So lets say you were given every thing you asked for but in return you had to see the consequnces on the people your choices affected. The best example I can think of is King David he literally could make anything happen and when he chose to sleep with another mans wife that man died. But David had to live knowing that. So my real question is if you had a way to see the future of each choice in life do you think you would live in the moment, make the best choice for those the choice effected, or make the choice that best effects you in the long run.

Here is my answer I would choose what best effects me in the long run as long as it did not hurt someone else in the long run.