When reading the bible, ask the why question. In hunting down the answer you will gain a deeper understanding and a deeper respect for the integrity of the word. A respect for its content and possibly a revelation or two. You are certain to learn something not usually taught in Sunday school.
If you have trouble finding the why, put Jesus in the middle of the question. It will begin to clear things up greatly.
Be careful, you might learn things that make you uncomfortable. Things directly confrontational with the teachings of modern religious institutions.
Some other keys to understanding: Let go of your preconceptions. Read the words on the page. Do not take anyone’s word as a substitute for scripture. Listen with an open mind, then look it up to see if it is true.