An object would become a blur when it moved fast, a faint shadow when it moved faster, and practically invisible when it moved fastest. But no matter how fast the object moved, traces of its existence would still be sensed.
This is due to its interaction with other matter during its movement.
However, Hecate realized that was only true up until a certain speed. The limitations of the third dimension had restricted her thinking.
In the fourth dimension, everything would be far more complex.
Anything and everything would contain so much more information, and the fourth-dimensional beings had to absorb this information instantly to function normally.
After all, when third-dimensional beings see their third-dimensional world, they immediately recognize the sun and moon, heaven and earth, and mountains and rivers. They don't just freeze to process what they are; they see what they see and know what they know.