I have always wondered if verse 4-91 was translated correctly in the English translation of the Ofudesaki. The word oshi has many meanings. Of course mute is one of them, but is it the right translation? Why would the enabling of a mute person to talk God’s salvation? Is this the purpose of the Youki-tsutome to heal existing disorders? God does give us a grant to cure illness, the Osazuke. But according to the Ofudesaki, the prayer only cures illness that God has placed as guidance. So what is the purpose of the Youki-tsutome?
The purpose of the Youki-tsutome is to ask God to help sweep the minds of the people we have introduced the teaching. How does God do this? God places illness as guidance as mentioned in verse 4-91. By these illness God is showing them their future, as they will likely act on their existing negative thoughts in their minds. It is these negative thoughts that God wants people to eliminate from their minds. If they understand God’s guidance, they will come to our places of worship to be healed by the Osazuke, and given further information so they can purify their minds by themselves. When their minds are pure of negative thoughts, only joy and health will appear from their own soul. They are then saved.
In summary, this is what verse 4-91 is saying. It is not about a mute person.
