He’s Dreamin’!

It seems to me that delusion has an intricate part to play in mental illness. If this is not delusional, then, the less delusional, or more factual or accurate we are, the healthier, in our own mind we are going to be…maybe.
Is it possible that the more surety we are continually seeking, the less likely we are to be mentally unstable.

I believe this idea could be tested.