On Simple Living, or Something Like It

There are so many things about religion and politics that I don't understand, and feel like I can't even begin to understand.

I've never read the Bible in its entirety, so I am unable to argue about many religious topics with "quotes" or somesuch to back me up.

The basis of my 'religion' comes from what I feel is right in my heart. I don't know how to explain it in any other way.

Does God want us to live simply? I guess so. Why? Should I feel guilty about owning a large house? Why? I do feel guilty for having so much while others have so little. Where is the line crossed? Should I feel guilty for enjoying a hobby, or should I spend all of my time helping others? Why are there so many misguided people? Why is it so hard to find out what God wants us to do in our lives?