Faith isn't just accepting an intellectual proposition. Faith means living our trust in God . It means saying our prayer, and then it means living our prayer. Faith means living in the same spirit in which we pray. Faith means living as if we expect God to do something.
Faith is nothing unless it is living faith.
Because of that, praying for healing is expensive. When we pray, we need to plan our lives around the expectation that God will act. We organize our time around the basis that God cares. So, we help the person in need of healing, or we help their family. We pray, over and over again, in the knowledge of God's love, and in the expectation that God will act in the very best way possible in that situation.