Read it through once

“By your letter to Mina last night. I was in doubt, and then everything took a hue of unreality, and I did not know what to trust, even the evidence of my own senses. Not knowing what to trust, I did not know what to do; and so had only to keep on working in what had hitherto been the groove of my life. The groove ceased to avail me, and I mistrusted myself. Doctor, you don’t know what it is to doubt everything, even yourself. No, you don’t; you couldn’t with eyebrows like yours.” He seemed pleased, and laughed as he said:--