Sickness is a decision. It is not a thing that happens to you, quite unsought, which makes you weak and brings you suffering. It is a choice you make, a plan you lay, when for an instant truth arises in your own deluded mind, and all your world appears to totter and prepare to fall. Now are you sick, that truth may go away and threaten your establishments no more. (https://acim.org/acim/en/s/541#7:1-4 | W-136.7:1-4)