Your faith wavers when you focus on your problems and circumstances. The Bible is the anchor of your faith. No matter what comes your way or how you feel, when you read God's Word, you will become concentrated on Him. God is the only firm, unchanging foundation on which to base anything, especially your prayers. Faith that creates powerful praying is centered on Jesus Christ.
Prayer generated by faith can change the world.
Elijah had such faith and assurance in God, that he was enabled to demonstrate his faith in prayer. He prayed to God trusting Him to bring the answer and the work of God to change the hearts of others. Don't allow your prayers to be clutched by wavering faith. Doubt and fear are foes of prayer and faith, and the result is troubled, self-centered prayer. God answers your prayers according to His purpose and timing.