Each person's IQ. Some people are very rare. There are a lot of talented people, but people who have a little too much, like a fool, it's not good, not good enough. Thus, the person everyone has the ability to learn differently and have different moods.
Each IQ of unequal Some have more, some have less people are very good at it. But people are a little like a fool. More is not necessarily better It is too bad as well. So everyone is capable of learning varies. And moods are different too.
IQ of each unequal, some more, some less, who is good, but a little like a fool, too bad, too little is not good as well. So people everyone has different learning abilities.