He seems to imagine that he may go blind, declares that he cannot eat this and that, shuts himself up from his friends, and feels the whole burden of the world pressing on his soul.
It is impossible to judge him as one would judge a perfectly healthy man.
The most conspicuous thing in his character is its transilience.

One is aware in him of an anacoluthic quality, as if his mind suddenly stopped leaping in one direction to begin jumping in a quite contrary direction.
It cannot be said that his mind _works_ in any direction.

It is not a trained mind.

It does not know how to think and cannot support the burden of trying to think.

It springs at ideas and goes off with them in haste too great for reflection.