A prayer without faith

How strong is your faith in God? The woman with the issue of blood in Matthew 9:20-22 believed that if she could only touch the hem of Jesus' garment she will be healed, despite the crowd the distraction she pressed to get her breakthrough. The centurion in the gospel of Luke 7:1-10 only needed to say the word Jesus for his servant to be healed and at the mention of his name healing took place. without faith it is impossible to please God.

Abraham was counted as a man of faith, in Genesis 15:6. The lord recently revealed to me via dream the answer to why christians are not getting their prayers answered, when they pray. It Is because he or she has doubt in their heart, and there is demonic presence in the atmosphere blocking those prayers. This reminds me of the scripture in Ephesians 6:12 that says for we wrestle not against flesh and blood, but against principalities, powers, and rulers in higher places. A prayer without faith is a waste of one energy.