Dr. Martin Luther King, Jr. said, "To take the first step in faith, you don't have to see the whole staircase: just take the first step."
Faith is a very difficult notion. So many try to compensate for a lack of faith by using will-power or rituals. And so many feel they have no faith, that they constantly fall short of believing in whatever deity they want to believe in.
In my metaphysical readings, I came across the statement that faith requires - faith. At first glance, that doesn't seem all that helpful. But here is what is meant: Faith isn't something you start out with, faith is something you give yourself by just believing it is worth it. Faith isn't something you have; it is something you build.
You need just that one belief: That there is a power in the Universe that wishes you well and that you are a part of and therefore can use. Evyerthing in this world is meant to support and continue life. You are no exception to this rule.