Montgomery had a fascination with the mind
Montgomery had a fascination with the mind. What was unusual in him was his instinct that the observer is as unreliable as the observed. The two kinds of movement interact like variables and a complex mathematical equation,. With the result that one could find no secure point from which to measure anything. To try to understand the world is like grasping a cloud of gas, or a liquid, using hands that are themselves made of gas or water so that they dissolve as you close them. Any conclusions that you reach on this subject means very little, because you're imagination can make you believe you are experiencing enhanced pleasure whether you really are or not. In the end, the oddity of the human mind is all we can be sure of it is an extraordinary conclusion which seems to bear no relation to the topic he was originally aiming at.
— from The Mind in the Cockpit · How to Live by Sarah Bakewell