The aim of science is, on the one hand, a comprehension, as complete as possible, of the connection between the sense experiences in their totality, and, on the other hand, the accomplishment of this aim by the use of a minimum of primary concepts and relations. (Seeking, as far as possible, logical unity in the world picture, i.e., paucity in logical elements.) ... Thus the story goes on until we have arrived at a system of the greatest conceivable unity, and of the greatest poverty of concepts of the logical foundations, which is still compatible with the observations made by our senses. ... It is a matter of faith that nature—as she is perceptible to our five senses—takes the character of such well-formulated puzzle. The successes reaped up to now by science do, it is true, give a certain encouragement for this faith. (Einstein 1936:293-295)