Can a believer in Jesus who has occasionaly doubts about matters of faith ever be effective in serving the Lord? Some people think that mature and growing Christians never question their beliefs. But just as we have experiences that can build our faith, we can also have experiences that cause us to temporarily doubt. A time of doubt doesn't have to become a life pattern. Allow God to lead you into a deeper understanding of His reality. Renew your faith. You can still accomplish great things for Him. Learn to doubt your doubts and believe your beliefs.