“All the illnesses that I had placed on Egypt, I will not place on you, for I the Lord am your healer” (Exodus 15:26).
Our sages ask: “If I will not place the illness, what is the need for a healer?” (Sanhedrin 101a).
We should interpret that since I am the healer, why should I place on you an illness if I must heal the illness? What do I gain by placing an illness? It must be as a punishment, and if I must heal the illness, what kind of punishment is it? It is as though I work for nothing.
For this reason, I will not place illness upon you, and what you think is illness, you are wrong about it. Rather, all the states you feel, if you attribute them to Me, are all corrections by which you will approach Me in Dvekut [adhesion].