It will remove your filter, which is supposed to filter out "insignificant" material, from all of your senses, and your subconscious thoughts. You have learned your whole life what is significant/insignificant. That includes any brainwashing, from religion, or what you were told all your life, school, television, anything you have denial about but just aren't conscious of.. It will open up your mind to all the other things going on in your brain, and after several trips or a few intense ones, you will feel like you understand the world, people, society, the universe, in a way you cant even come near putting into words. Everything can seem to be "connected", us, the world, everything.. no words can describe it.
Of course what you get out of a trip will depend on what you are thinking about during it, where you are at, setting, etc. I'm glad i tripped, i remember myself a year ago before i tripped, and i was a confused person, not sure what life is all about, not fully understanding of myself, not sure what i wanted to do, etc. Most of those "holes" are filled in now.