CAREFUL, SPOILERS FOR THE GOLDEN AGE ARC AND THE MILLENIUM FALCON ARC
I first read Berserk at fourteen years old, I had low self-esteem, and a pessimistic view on life. To me, making efforts was just another pain that you had to get through. After a while, of course, I began questioning the seemingly endless loop of pain and boredom I had found myself stuck in. Why was I trying so hard to succeed? To make friends? It is not a rule, written anywhere in the universe, that everyone is going to be happy. Some people are bound to suffer, and die in the saddest way possible. So why? That's what Berserk taught me.
The story is fairly simple: it is all tied to destiny and free will. The main protagonists of the Golden Age Arc, which is one of the best stories ever told by man, have both struggled in their life. On the one hand, there is Guts, a war-machine, mad-dog character, who was raped, beaten and betrayed before he was even ten years old, with no apparent drive other than survival. On the other, there is Griffith, born in the poorest district of his city, with no parents and no future, but absolutely driven to attain his goal to be the leader of the greatest kingdom on Earth. They become friends, and things happen. Simple, right?
Well, no. Because they are only men in a world of monsters, in a rapidly changing political climate and attempting to free themselves from master puppeteers. Throughout the manga, it is very clear that men have no actual free will, for the God Hand watches and schemes. The Behelit, a powerful artefact, is the embodiement of the impending doom that follows in a man's path towards achieving his dream. “While many can pursue their dreams in solitude, other dreams are like great storms blowing hundreds, even thousands of dreams apart in their wake. Dreams breathe life into men and can cage them in suffering. Men live and die by their dreams. But long after they have been abandoned they still smolder deep in men’s hearts. Some see nothing more than life and death. They are dead, for they have no dreams.”
The world of Berserk is bleak, to say the least, and it is only by giving it meaning that a man can survive. Dreams are the only things distinguising animals and the God Hand. But how does that compute with free will and destiny? Well, there's the Behelit on the one hand, which is the perfect embodiement of Griffith's drive to achieve his dream - as well as inescapable fate that leads to glory and power - and there's Guts' big fat sword on the other, embodying a more existentialist drive that recognizes nothing but survival - and the absence of fate, or rather a miserable one. It all comes together beautifully at the end of the first major story arc, the Golden Age, and although I will not spoil it for you, I can say this: the ending is a masterpiece.
Of course, the genius of Berserk's themes and characterization doesn't stop there. Casca, who is in love with Griffith, helps Guts regain some of the warmth he lost when his father figure sold his virginity to an adult. She is a warrior, with a heart of gold, but constantly taken down for being a woman. At the beginning of the Golden Age, she even has to sleep next to a wounded Guts because, and I quote, it is "the woman's duty to warm the man". I particularly appreciate this trio of characters. Griffith is entirely devoted to his dream, which gives him an aura of divine majesty in the gloomy life-and-death world of Berserk, but most of his interactions with Guts are surprisingly cold, despite his smiling. He comes to love his friend, but acts rashly and it costs him his dream. Guts has no dream of his own, but as Griffith leads him to battle again and again, he seemingly finds his own path in life, which causes Griffith's downfall. Casca is cold, even colder than Griffith and Guts, but she is entirely devoted to the man who once saved her. As she learns more and more about Guts, it becomes obvious that her feelings for the leader of the Band of the Hawk can never be returned, and she begins to build an identity of her own along with Guts. Griffith, in inspiring people, causes his own demise in more ways than one: his feelings for Guts cause him to act rashly and lose sight of his dream, he inspires Guts into rising to his level in gaining a dream of his own, and his cold treatment of Casca greatly accelerates this process.
There is also the matter of dealing with your pain, beautifully encapsulated in the Lost Children Arc, which sees an army of "elves" attack a human village - a very rare occurence, for elves are known for the peaceful nature and kind-hearted attitude. Guts is still dealing with his past, the child he protects is as well, and so was Griffith. In fact, all the characters in the story have to learn, at one point or another, how to deal with their pain. Griffith failed to do so, as he sacrificed his dream to run away from the pain of losing his friend, and then ran away some more in sacrificing them instead of growing as a person. Guts is evidently growing into a warm, kind-hearted and wise warrior, as he deals with his trauma and lets people in. In his case, the tragedy lies somewhere else, but we'll see that later on.
In the Millenium Falcon Arc, Guts' stuck between the fire and the frying pan. As he makes friends and lets go of his obsession, his strength decreases, which pushes him to give in to the all-consuming power of the Berserker Armor. In growing as a person, he loses his power as a warrior. In growing, he loses. To me, although the arc is less thematically coherent than the Golden Age Arc, it is one of the bleakest, most horrifying arc in all of Berserk. Guts has to face an all-powerful Griffith, and his inevitable rebirth, as Berserk's version of Jesus Christ comes back to Earth to bring forth an era of peace and prosperity. It is absolute genius, with especially a game-breaking story arc, that feels less like a story, and more like a myth: the birth of the Falcon of Darkness, and the creation of His mighty kingdom, populated with regular people seeking light, and monsters like the world has never seen (Griffith, aka the Egomaniac Bird, being first among them).
There are many, many more themes to Berserk, but I won't write a dissertation on it... Yet. Berserk is an intricate and multi-layered story, with some of the greatest characters in all of literature (Griffith and Guts, for instance), and has inspired quite a few artists in the world, thanks to its writing and drawing style by Kentaro Miura.
It is a masterpiece and a must-read to all those who think manga can't be art.