The Problem of Perception

“Rouen Cathedral”, by Claude Monet.
I don’t even need colors to make my point.

If there is a world full of objects that are independent of my own body or mind, and if I can only know them through the effects they have on my body’s senses, in turn causing mental states of awareness in my brain where these objects are represented, how can I ever know that these representations correspond to the objects or, in other words, that my perceptions correspond to reality?