1. For every problem in this world, 2. There either exists a solution or doesn't 3. If there is a solution, never give up until you find it 4. If the problem is beyond your control and you cannot help it, just forget the problem and be happy :) the basic message of the entire thing "Don't worry" :)

Maybe: There is a solution for every problem. Keep looking until you find the solution but , if there is none, then forget about looking for one (or perhaps, change your atttitude toward the problem) The final word, ''it," could refer to either the problem or the solution, so the last phrase is not clear.