I struggle with picturing 4D rotating objects, I find it easier to deal with slicing the object up and picturing that. To clarify if you think of a single pictu

I struggle with picturing 4D rotating objects, I find it easier to deal with slicing the object up and picturing that. To clarify if you think of a single picture from an MRI it's a slice of a 3D object and you can move up and down the object to see each slice. If you move through all the slices you can get an idea of the 3D shape. With the 4th dimension it's similar except each of the slices is a 3D shape. So a 4D “sphere” sliced up this way would look like a 3d sphere that gradually got bigger until halfway through the 4D “sphere” then gets smaller again. You can also somewhat consider it a 3D object that changes shape with time but since time is a dimension you can go back and forward along it. That's how I picture 4D objects which is admittedly not as well as some people do.