Athanasius of Alexandria was a very smart Christian man who lived a long time ago in a city called Alexandria. He was like a leader for the Christian people there. But why was he important? Well, it's because he had some really big ideas about God and Jesus.
You know how your parents and teachers tell you that Jesus is God's son? Athanasius believed that too. He thought Jesus was not just a regular person, but actually God himself, living on earth. This idea was very different from what some other people believed at that time.
Now, there were some people who didn't agree with Athanasius. They thought that Jesus was just a special human being, but not actually God. They argued with Athanasius and said he was wrong. This caused a lot of confusion and arguments among the Christian people.
Athanasius didn't give up though. He believed so strongly in his ideas that he wrote many books and letters to explain them. He also traveled to different places to talk to people and convince them that he was right.
Because Athanasius was so determined and passionate, many people started to agree with him. They believed that Jesus was indeed God himself. Athanasius became very famous and respected among the Christian people.
But not everyone liked Athanasius and his ideas. There were some powerful people who wanted to get rid of him because they didn't agree with him. They even tried to send him away from Alexandria, but Athanasius kept coming back.
Despite all the challenges he faced, Athanasius never stopped fighting for what he believed in. He knew that his ideas were important for the Christian faith. And guess what? Even after he died, his ideas continued to influence people and shape the beliefs of many Christians around the world.
So, Athanasius of Alexandria was a brave and influential man who believed that Jesus was God himself. He wrote many books and letters to explain his ideas and convinced many people. His determination and passion made him a very important figure in the history of Christianity.