I do not pray for anything. I am not nearly strong enough to do that. I pray for strength, patience, understanding, the ability to love God, detachment from the physical world and other qualities. I will pray for the healing or benefit of other people. However I have noticed that some healing prayers have lines like 'Thou, verily, art the All-Bountiful, the All-Knowing, the All-Wise.' So it seems to me we are not praying for healing, we are praying for the correct outcome.