"Leibniz noted that things can be compared either in terms of what one contains of the other, which is to compare them by their quantity, or in terms of their similarity to one another, which is to compare them by their qualities. To reduce a question of measurement to a question of order or arrangement is therefore to move from the point of view of quantity to that of quality, to move from a lower genus, where deduction is appropriate, to a higher genus, where only intuition has a place [...]. (La filosofia di Pascal, p. 153)"