Seeing the tree means to be completely absorbed in the problem.  To see no exit, no solution, to be stuck in the drama of what is happening at that moment.  To see the forest is nothing more than keeping an open mind to the infinite possibilities all around us.  These possibilities can be things we already know and have forgotten or completely different things that we 

 have thought possible.  Many times the best solutions are not even logical, they come from the most unexpected places and the least conventional forms.  To see these opportunities we have to keep our minds open, be willing to try new things.  Only then can we find solutions to our problems.