III. Thinking in the Service of Understanding the World

Against my sentence, We must think before we can contemplate thinking, someone might easily set another sentence as being equally valid: We cannot wait with digesting, either, until we have observed the process of digestion. This objection would be similar to the one made by Pascal[^5] against Cartesius, when he maintained that one could also say: I go for a walk, therefore I am. Certainly I must resolutely get on with digesting before I have studied the physiological process of digestion. But this could only be compared with the contemplation of thinking if, after having digested, I were not to contemplate it with thinking, but were to eat and digest it. It is, after all, not without significance that whereas digestion cannot become the object of digestion, thinking can very well become the object of thinking.