God also will many times Speak to us using images, could be a mental picture in our minds or an actual picture like a painting or a photo from long ago. Have you ever seen an old photo of you as a child and then you remember how simple things used to be back then? That could be god saying to you that you need to slow down and spend more time with him. A picture of your dead relatives smiling face could be god saying that this person is in a happy place. Beleive me there are countless ways he talks and countless meanings to them all. But they are never to sadden you or discourage you. The devil on the other hand uses your fears or shame, and when you start paying attention to them instead of god these feelings intinsify. I cannot stress it enough god is a god of love and warmth, the devil will even use the bible to speak to you. I know how offending this sounds but its the truth. The devil knows the bible very well and he knows what would hurt you the most, so if you start feeling shame or sadness from reading the bible that is not of god. The difference between guilt and shame is guilt leads to life shame to death. When you feel guilty you have the urge to repent because of how horrible you feel, but shame has lead to suicides, lies, murder, irritation, and so on. so yes the devil knows many tricks but always remember there is a limit to what he can do.