Fantasy is likely a main theme too. Since there's a secret door, it might lead to magical or extraordinary places. The other stories probably also have elements of the fantastical, like strange creatures or unusual powers, which all contribute to a fantasy - themed collection of stories.
One main theme could be the exploration of the self. In 'The Secret Sharer', the protagonist's encounter with his double makes him question his own identity and moral boundaries. Another theme might be isolation. The characters often seem to be alone in their experiences, whether on a ship at sea or in other settings.
Well, I think family could be a theme. In many short story collections, there are often tales that revolve around family relationships. Also, nature could be a theme considering the mention of a pool which is a part of nature. The stories might explore how characters interact with nature.
Maybe an old wise figure, like an old man or woman who knows the secrets behind the door or has some knowledge about the events in the other stories. They could guide the younger characters or be a source of mystery themselves. For example, they might have a past connection to the secret door that is gradually revealed throughout the stories.
One main theme could be the complexity of human relationships. In Zweig's stories, he often delves into the intricacies between characters, like the unspoken desires and hidden emotions. Another theme might be the exploration of the human psyche. His characters' inner thoughts and motives are often laid bare, showing how people can be driven by different forces within them.
One possible theme could be mystery. A secret door often implies something hidden and unknown, which creates a sense of mystery.
Well, since I don't know the details of 'the secret door short story', I can only guess based on common themes. It could be that the main plot is centered on a character's search for the secret door. This search might be driven by a desire for something more in their life, like a sense of adventure or a longing for the unknown. When they finally locate the door, it might lead them to a self - discovery journey or a place that changes their perspective on life.
The characters involved are also important elements. There could be a brave explorer who is determined to find out what's behind the secret door. And there might be antagonists who don't want the door to be opened. Also, the setting where the secret door is located plays a role. If it's in a dark, damp cave, it adds to the sense of mystery.
One of the main themes could be mystery. Since it's called 'The Secret Stories', there's likely an element of the unknown that runs throughout. Another theme might be discovery, as secrets are often uncovered in stories.
The main themes could include the exploration of the unknown. Given the title, it's obvious that the characters are delving into something not commonly known. Another theme might be transformation. As they experience the other side of the secret, they may change in some way. And loyalty could be a theme as well. Characters might need to be loyal to each other in order to survive or understand the secret world.
I don't know since I don't have details about this specific 'the secret door story'. It could be a young adventurer, an old wizard, or just an ordinary person who stumbles upon the secret door.