this manga taught a lot of things:
from naruto, to never give up on your dreams
from sasuke, to cherish your friends, they will be there whether you need them or not
from the great nations, a society's stability depends on each citizen's willingness to help their country, be he a lowly student or the president
from itachi, to love your family & know what's good for them or not
from minato, to plan your moves ahead
from kushina, to know your strengths & weaknesses & not be discouraged if you are not good at something
from kakashi, to enjoy life & give humor & not be serious at all times no matter how genius you are
from sakura, to be strong enough to protect everyone you love
from hinata, to love with all of your heart and get inspired from it
from orochimaru, to learn to accept the heartaches of this world & be contented with your life's limits
from madara, to be noble & not conquer the world intentionally because the (for want of a better word bec i don't know what word to use)
best conquerors are those who don't think they are born leaders but just find that leadership fits them well
(like harry potter & naruto)
& the list goes on...