The world at the present moment is pitiably “short” in its stock of sound theories of knowledge. The prevailing psychologies do not explain knowledge at all. The behaviorists do not try to explain it any more than the astronomer or the physicist does. The psychologist who reduces mind to an aggregation of describable “mind-states” has started out on a course which makes an explanation forever impossible, since knowledge can be explained only through unity and integral wholeness, never through an aggregation of parts, as though it were a mental “shower of shot.” If we expect to talk about _knowledge_ and seriously propose to use that great word _truth_, we must at least begin with the assumption of an intelligent, creative, organizing center of self-consciousness which can transcend itself and can _know_ what is beyond and other than itself. In short, the talk about a “chasm” between subject and object—knower and thing known—is as absurd as it would be to talk of a chasm between the convex and the concave sides of a curve. Knowledge is always knowledge of an object and mystical experience has all the essential marks of objective reference, as certainly as other forms of experience have. Professor J. M. Baldwin very well says that there is a form of contemplation in which, as in æsthetic experience, the strands of the mind’s diverging dualisms are “_merged and fused_.” He adds: “In this experience of a fusion which is not a mixture but which issues in a meaning of its own sort and kind, an experience whose essential character is just this unity of comprehension, consciousness attains its completest, its most direct, and its final apprehension of what Reality is and means.” It really comes round to the question whether the mind of a self-conscious person has any way of approach, except by way of the senses, to any kind of reality. There is no _a priori_ answer to that question. It can only be settled by experience. It is, therefore, pure dogmatism to say, as Professor Dunlap in his recent attack on mysticism does, that all conscious processes are based on sense-stimulation and all thought as well as perception depends on reaction to sense-stimulus. It is no doubt true that behavior psychology must resort to some such formula, but that only means that such psychology is always dealing with greatly transformed and reduced beings, when it attempts to deal with persons like us who, in the richness of our concrete lives, are never reduced to “behavior-beings.” We have interior dimensions and that is the end on’t! Some persons—and they are by no means feeble-minded individuals—are as certain that they have commerce with a world within as they are that they have experiences of a world outside in space. Thomas Aquinas, who neither in method nor in doctrine leaned toward mysticism, though he was most certainly “a harmonized man,” and who in theory postponed the vision of God to a realm beyond death, nevertheless