Aristotle, Nicomachean Ethics, Book I — Key Points (Ends, Good, Happiness)

Every action, project, and choice we make is done to achieve something good; these goals (or "ends") can be activities themselves or the things that result from those activities.
Sometimes, the results of an activity are more important and valuable than the activity itself.
Big goals (like health from medicine, or winning in strategy) are preferred because smaller goals are pursued to help achieve these bigger, main goals.
The goals of smaller tasks help achieve the main goal, whether that main goal is an action or a final product.

If there's one thing we want just for itself, and not because it helps us get something else, that one thing is the ultimate "good" or the best possible goal.
The study that focuses on this ultimate goal is the most important one. It seems like politics is this most important subject because it decides what other subjects people should study, what citizens learn, and how much, and it creates laws about what we can and cannot do.
The goal of politics should include the goals of all other studies. So, the political goal must be what's best for human life, and what's good for an entire community is even more important than what's good for one person.
Achieving the highest good for a whole city or nation might be considered a greater achievement than for just one individual.

When we talk about these ideas, we should be clear, but not every topic can be perfectly exact.
What's considered good or right can change and is sometimes just based on tradition, so we need to be a bit general when we talk about it.
Someone who is truly educated in a subject is a good judge of it; someone with a broad education can judge well in most things.
A young person might not be the best listener for discussions about politics because this subject is about how we act in real life, and it's more about doing than just knowing. Young people often need more life experience.
This section about students and the purpose of our discussion is just an introduction.

Most people agree that "happiness" is the main goal of life (meaning living well and doing well), but they disagree about what happiness actually is.
People think happiness is different things: pleasure, money, respect, health. Even the same person might think it's different things at different times.
Some believe there's a perfect "Good" that exists beyond these everyday good things. It's more useful to look at the most common or strongest opinions rather than every single idea.
There's a difference between starting with basic ideas and working towards them. True understanding often begins with what we already know and have learned through habit.

People usually live in one of three main ways: a life of seeking pleasure, a life involved in public affairs (politics), or a life of deep thought and study.
Most people tend to prefer a life focused on enjoyment. Important and active people often link happiness with respect (honor), which is connected to having good character (virtue).
Having good character (virtue) seems closer to the ultimate good than just getting respect, because virtue is about who you are on the inside, not just what others think of you.
Money is not the ultimate good; it's just a tool to get other things, not a goal in itself.
We'll look at the life of deep thought and study later. The other types of lives are discussed here to compare them.

When we ask if there's one single, universal idea of "good" that applies to everything, it's complicated.
The word "good" means different things in different situations (like a good person, a good quality, a good relationship). What is inherently good comes before things that are good in relation to something else.
There isn't one abstract idea that ties all good things together; the meaning of "good" depends on the situation or category.

What is "good" for anything is how well it performs its specific task or purpose ("function"); for humans, the good comes from how well a human performs the "function of man."
The function of a human is to be active with one's soul, guided by reason. A person's good is when they do this function well, in line with excellent character (virtue), especially the best and most complete kind of virtue.
To truly be happy or achieve human good, one needs a complete life, not just a day or a moment of good fortune.
We start with basic truths. Some we learn by example, by seeing, or by getting used to them. The beginning is very important, and over time we discover more.

Good things have been grouped into three categories for us to understand them:
- Goods of the soul: These are inner qualities like virtues and good character.
- External goods: These are things related to our body or what happens to us, like money, health, friends, and respect.
- Goods of fortune: These are external things related to chance or luck.
Happiness isn't just one of these categories alone; external goods and luck do play a role in a good life, but they aren't enough on their own to bring happiness.