Not every epic anime moment is a fight scene or a confession of love. Sometimes, the greatest moments in an anime are when the characters make their voices heard. The best anime speeches can be inspiring, like when Eren Jaeger of Attack on Titan urges his comrades to fight on against the Titans, or when Sora from No Game No Life convinces the people he now governs that their strength lies in their weaknesses. But they can also reveal character, like when Death Note's L tells a group of children that he can't truly relate to other human beings, and that scares him.
Greatness doesn't even require logic - Gintoki from Gintama gets a round of applause for his rousing speech about wetting the bed after drinking too much strawberry milk.
The best parts of Assassination Classroom are the parts where you can see how effective Korosensei is as a teacher. After speaking harshly to Karma, an arrogant boy with excellent grades, he explains why he chose to do so. His reasoning is sound, and it also shows how much he's thinking about the right teaching method for each child:
I cut him down so he'll spring back up. The boy's enormously talented, there's no denying that. But he's a novice. He's not yet learned how to be worthy of that talent. He refuses to meet any challenge except on his own terms. He doesn't see the true value of competition. To a young person for whom everything comes easily, the pain of defeat can be a much needed wake-up call.
On the surface the whole concept of exams may seem arbitrary, but deep down, it's not about grades, it's about rising to the occasion. It's about tasting the rapture an triumph and disgrace of failure. They go hand in hand you see. One is meaningless without the other. To win, one has to lose! The difference between the novice and the master is that the master has failed more times than the novice has tried.
When Sora and Shiro take the throne, they know that they have to inspire their people - but those people have no special powers, and feel that they stand little chance against their magical enemies. By emphasizing the power that comes from weakness, Sora rallies his kingdom:
My beloved citizens... No, my fellow Imanity. We Imanity live in a world where [conflict] is forbidden. By the 10 pledges yet we lost again and again and now all we have left is Elchea, our last city.
So I ask you now: Why is this? Is it because the last king failed? Because we are the lowest ranked race? Because we can’t use magic? Because we are fated to [perish], helpless? No! In the ancient [conflict], the gods, the elves, the warbeast, all the races fought and we fought among them and survived!
Why is it that this whole continent was once ruled by humans? Is it because we are a species that specializes in [aggression]? We can’t use magic like the elves, nor are we physically strong like the warbeast nor do we have the longevity of the Flügel. Why were we able to rule this continent? Is it because we are master of [conflict]? I tell you it’s not! We fought and survived because we are weak! In every time, in every world, the strong polish their fangs while the weak polish their wisdom.
Why are we in such danger now? Because the 10 pledges have broken the fangs of the strong, they have learned to polish their wisdom. The wisdom and strategies that we the weak, once monopolized. The power to survive. The strong have gained them all! And brought us to this state!
Answer me this, everyone! Why do you bow your heads? I repeat, why do you bow your heads? We are the weak! We are the weak, just as we have always been! Yes, nothing has changed at all! The strong may imitate our weapons, but they will never master them! Because at the hearts of our weapons lies the cowardice born of almost humiliating weakness. This cowardice has given us the wisdom to escape from magic. This cowardice has given us the wisdom, born from learning, and the experience to predict the future itself!
I say for the third time, we are the weak! We are the proud weak who throughout history, who torn out the throats of those who sit back and boast out their strength!
We declare now that we are Elkia’s 205th king and queen. We hereby declare that we will live as the weak, fight as the weak, and as the weak we will destroy the strong! As we once were and as we will always be.
Accept the fact that we are the weakest race. Accept that we are the weakest race, one that can become anything, because we are born with nothing!
L Lawliet is always something of an enigma. In this surprisingly insightful speech, he tells the children of Wammy's House something deeply personal about himself:
There are many types of monsters that scare me: monsters who cause trouble without showing themselves, monsters who [take] children, monsters who devour dreams, monsters who suck blood... and then, monsters who tell nothing but lies. Lying monsters are a real nuisance: They are much more cunning than others.
They pose as humans even though they have no understanding of the human heart; they eat even though they've never experienced hunger; they study even though they have no interest in academics; they seek friendship even though they do not know how to love. If I were to encounter such monsters, I would likely be eaten by them... because in truth, I am that monster.
Until Kamina's tragic passing, Simon relies on him as a source of confidence and safety. With Kamina gone, he has to stand on his own two feet. In this short but soaring speech, he declares his personal power and independence:
My bro is... gone! But he's right there on my back. And here in my heart! He lives on as a part of me! If you're gonna dig, dig to the heavens! No matter what's in my way, I won't stop. Once I've dug through, it means that I've won! Just who... do you think I am? I'm Simon! I'm not my bro! I'm me! Simon the Digger!