Thank you for your response.
But this is what I feel: If I have 1 million dollars saved for retirement I feel secure. If I have 2 million dollars saved I would feel much more secure, approximately twice as secure. If I had 3 million I’d feel approximately 2.5 times more secure. So I see the point of diminishing marginal utility .
I wonder about units of states of mind, could funniness, a joke, be measured by the number of laughs? Could sadness be measured by the number of tears or sobs?