In the Ofudesaki, God tells us God will begin to work. What will God do? God will begin to place guidance to help others understand the heart. What are these guidances that God will begin to show us? These guidances are illnesses upon our bodies. God I believe does not call these illnesses, because it is usually our own hearts that bring forth illness upon our bodies. So you can say that God is showing us what our hearts will bring upon us (fate) if we do not purify our minds. Our hearts make sure we reap what we have sowed. This is a loving and parental God that is showing us our future by these guidance. The following is from chapter 14 of the Ofudesaki.
(Dona yona) (koto demo Tsukihi) (suru koto ya)
(Ikana koto demo) (yamai dewa nai) 14-20
Whatever kind of thing, it is what God does.
What kind of thing, it is not an illness.
(Minouchi ni) (dono yona koto o) (shita totemo)
(Yamai dewa nai) (Tsukihi teiri ya) 14-21
Within the body, whatever I do,
It is not an illness. It is God guidance.
(Sekai niwa) (korera to yute) (iru keredo)
(Tsukihi zannen) (shirasu koto nari) 14-22
The world is saying that it is cholera,
God’s regret (of having dust), I am informing you.
The word kataude has two meanings, one is right-hand man, signifying people that are important. The other definition is one arm. I am more inclined to believe that God placed illness on the arms of three of the scheduled member of the Service, as a way of communicating how important our Service is to save the world. The withdraw (shirizoku) of fire and water is the placing of illness by God. This next verse will confirm this.