Soooo many things said by kakashi during the early series, both meaningful, comical, or otherwise.
Being different isn't always better. The nail that sticks out is often the one that gets hammered down first.
Those who break the rules are scum, but those who abandon their comrades are lower than scum.
Thinking you get it and saying you get it aren't the same thing as actually getting it. Get it?
My first impression is they're all a bunch of idiots.
Sorry I'm late. I'm afraid I got lost on the path of life.
Hiruzen to Orochimaru about the village.
Naruto to neji about destiny.
Naruto to Zabuza. It's one of the reasons I ended up liking this series so much, because the characters aren't all just black and white good/evil. They're human. The villains in particular are very deep and capable of having a change of heart when someone talks some sense into them.
The philosophical debate between Naruto and Nagato.