PyTorch - What's the Difference Between a Torch and a Module?

The torch and then module is what lightning extends or improves on. PyTorch allows you to define arbitrary operations on a computational graph that can be chained together. So it's, I don't know, I guess the highway for the math under the hood. And then lightning module extends that so that you get all this added benefits to it, right? You get the abstractions. It allows a training process to know what to call when.