He is seriously ill
To understand the expression "he is laboring under the delusion of a serious nature," let's analyze the key elements of the sentence.
Given these points, the expression suggests that the person is making an error in judgment by holding onto a false belief. Let's examine the options to find the most appropriate one:
Therefore, the most appropriate interpretation is that the person is committing a mistake by holding a false belief or delusion. Thus, the correct answer is: "He is committing a mistake."
"Kick the bucket'' -- Select the correct phrase meaning