Different conclusions are reached when one fact is viewed from two separate points of view. When that happens, there is no immediate way to judge which point of view is the correct one. There is no way to conclude one’s own conclusion is the correct one.
Now that naruto and sasuke died, they will go to king kai's world, in where they'll learn many techniques. They'll return with kaioken, genki dama(spirit bomb), and fusion. Besides, they'll get stronger because they'll train on increased gravity.