WYSIWYG

For the sake of universality I withhold some details of the place and the names of the people involved. This is held to be true and well documented in a book and in the chronicle of the place.

The Force
The place was known to be where God performs myriads of miracles already.  In fact, that was the reason why Ivan's family brought him there. Ivan was a certified atheist, he claimed. His family, however, 'forced' him to bring him there for the hope that he would be able to see again after he lost his sight in an accident. According to the doctors, it's beyond cure because it destroyed most of the nerves around his eyes.

Ivan's hatred in God started a long time ago when he was still in the army and still had his sight. Nobody knew where it exactly started. But his friends and family regarded it was an evolution.

An Opportunity
The primary reason why Ivan agreed to come with his family was precisely to prove to them that God was indeed a product of man's need to fill the void of emptiness in each of them.  This should be an affirmation of his argument. If there is anything Ivan remembers about God, it was hatred. God is dead, and God is the reason of man's suffering.

On their third day, like any other morning, people began to swarm into the spring where miracles and healing should take place. As usual, he refused to be led into its perimeter. This time he overheard a boy shouting in deep prayer and frustration, "Lord, please, heal me. It's been a year now since I came here. My family has been suffering too. Please, let me walk again. I want to play and run and jump as well with my friends!"

To Ivan, it was too much for his temper. He stood up and shouted: "Hey, whoever you are this boy is praying for, answer his prayer! Haven't you heard that?! You're heartless and never cared!" His military commanding voice echoed several times around the cave-like place. At that, a miracle started to unfold. Nobody noticed it except Ivan: the boy was still on the wheelchair. He saw him. He saw the boy!

WYSIWYG
As for the record, the boy was not healed that day. Ivan, however, had his sight back. Nobody could make a more sensible explanation why it was Ivan who received the miracle; people could only speculate. Some unbelievers attributed it to the power of benevolence, some to an instant karma, some to a psycho-physiological phenomenon. To the people who have faith in their hearts, no explanation was needed: WYSIWYG: God works miracles...