'We must become as little children again, if we will be philosophers!' The phrase appears here almost in passing, and Reid never came back to it again. And yet in it is contained the Open Sesame which gives access to the hidden spirit-treasures of the world. In this unawareness of Reid's of the importance of what he thus had found we must see the reason for his incapacity to develop his philosophy beyond its first beginnings. This handicap arose from the fact that in all his thinking he was guided by a picture of the being of man which - as a child of his time, dominated by the contemporary religious outlook - he could never realize distinctly. Yet without a clear conception of this picture no justice can be done to Reid's concept of common sense. Our next task, therefore, must be to evoke this picture as clearly as we can * * * The following passage in Reid's Inquiry provides a key for the understanding of his difficulty in conceiving an adequate picture of man's being. In this passage Reid maintains that all art is based on man's experience of the natural language of things, and that in every human being there lives an inborn artist who is more or less crippled by man's growing accustomed to the state of artificial language in his intercourse with the world. In continuation of the passage quoted on page 99 Reid says: 'It were easy to show, that the fine arts of the musician, the painter, the actor, and the orator, so far as they are expressive; although the knowledge of them requires in us a delicate taste, a nice judgment, and much study and practice; yet they are nothing else but the language of nature, which we brought into the world with us, but have unlearned by disuse and so find the greatest difficulty in recovering it. 'Abolish the use of articulate sounds and writing among mankind for a century, and every man would be a painter, an actor, and an orator. We mean not to affirm that such an expedient is practicable; or if it were, that the advantage would counterbalance the loss; but that, as men are led by nature and necessity to converse together they will use every means in their power to make themselves understood; and where they cannot do this by artificial signs, they will do it as far as possible by natural ones: and he that understands perfectly the use of natural signs, must be the best judge in all expressive arts.'