The horse in the book The Horse Whisperer says, "My mother and an old riding horse seemed to know all about it." This is a reference to the horses' understanding of the natural world and their ability to communicate with each other.
The horses in The Horse Whisperer are able to sense things that humans cannot. They can feel the energy of the land and the animals around them. They can also communicate with each other through a variety of means, including body language, vocalizations, and even telepathy.
The horse in the quote is referring to this ability of the horses to know things. He says that his mother and the old riding horse seemed to know "all about it," meaning that they knew about the natural world and their place in it.
The horses in The Horse Whisperer are a symbol of the power of nature and the interconnectedness of all living things. They represent the wisdom that can be found in the natural world, and they offer a reminder that we are all part of something larger than ourselves.
As for how the horses know these things, it is never explicitly explained in the book. However, it is implied that the horses have a natural ability to sense and communicate with the world around them. This ability is likely due to their close connection to nature and their keen awareness of their surroundings.
The horses' understanding of the natural world is a valuable asset, and it helps them to survive and thrive in the wild. It also allows them to help humans, as they do in The Horse Whisperer. The horses in the book are able to help the injured girl, Grace, to heal both physically and emotionally. They do this by helping her to connect with nature and to understand her place in the world.
The horses in The Horse Whisperer are a reminder that we have much to learn from the natural world. They offer us a glimpse into a world that is often hidden from us, and they teach us about the power of connection and the importance of understanding our place in the universe.