Jesus indicated that experiencing the Kingdom of God in our lives this side of the Second Coming is not a given automatic. It was something Jesus indicated needed to be access through faith. Faith simply put is believing what God has said. At its heart faith is relational. It is contingent on an ongoing hearing of God.
faith comes from hearing the message, and the message is heard through the word about Christ. Romans 10:17
Given this it is important as believers that we know the voice of God in our lives.