So many a times we try to control what we think but then we forget that the things we see and hear are mostly what makes up the thoughts we have. We don't see any reason to stop going to some places to avoid seeing some things that are not good for our minds, we just welcome in everything with applying self control, I'm a victim of this and it's really not so easy to avoid these things but then I try to put in little effort every day and gradually they are building up.

Negativity comes when our minds are filled with unfiltered thoughts which manifests due to what we see, hear and even touch.