The sum of those things about which I can form mental pictures may be called my total experience. The man who has the greater number of individualized concepts will be the man of richer experience. A man who lacks all power of intuition is not capable of acquiring experience. He loses the objects again when they disappear from his field of vision, because he lacks the concepts which he should bring into relation with them. A man whose faculty of thinking is well developed, but whose perception functions badly owing to his clumsy sense organs, will just as little be able to gather experience. He can, it is true, acquire concepts by one means or another; but his intuitions lack the vivid reference to definite things. The unthinking traveler and the scholar living in abstract conceptual systems are alike incapable of acquiring a rich sum of experience.