If someone has prayed for us and nothing happens, does this mean God doesn't want to heal us and we can stop believing for an answered prayer? This also is not true. Maybe you prayed for a miracle and nothing happened. Many people stop believing at that moment, which is the opposite of what this scripture admonishes us to do: Mark 11:24 "Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them."
When you pray, believe that you received. This is where many Christians stumble. Many are familiar with Matthew 7:7 but when they don't receive right away, they give up. They should pay more attention to the scripture Matthew 7:7 "Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you." We have a responsibility to bring about God's will.
Some believe that God's will comes to pass no matter what we do, but that's not true. God is bound by He said in the Bible. See 2 Peter 3:9 about God not wanting anyone to perish but they do. God gave us authority over the devil, but we must exercise what God has given to us. God won't do it for us. Most people interpret God's Word by their own experience with the Word. There is a physical world and a spiritual world. The spiritual world created the physical world.
There is a spiritual reality for everything physical: 2 Kings 6:17 And Elisha prayed, and said, LORD, I pray thee, open his eyes, that he may see. And the LORD opened the eyes of the young man; and he saw: and, behold, the mountain was full of horses and chariots of fire round about Elisha.
Our battle is in the spirit realm until we see it in the physical realm. If you don't believe it until you receive it, you won't receive from God. That is not faith. The Bible says that you have to believe you receive it when you pray per Mark 11:24 "Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them." Believe and receive.