When Jesus healed the ten lepers, He told them to go show themselves to the priests! This was even before they were healed. This was certainly a call for faith to know they would be healed. As we pray, we have to begin with our spiritual perfection as a reflection of the one God and this knowledge and understanding brings about healing.
Psalm 5:2-3 states “Listen to my cry for help, my King and my God, for to you I pray. In the morning, O Lord, you hear my voice; in the morning I lay my requests before you and wait in expectation.”