The life of instinct is important, not only on its own account, or because of the direct usefulness of the actions which it inspires, but also because, if it is unsatisfactory, the individual life becomes detached and separated from the general life of man. All really profound sense of unity with others depends upon instinct, upon coöperation or agreement in some instinctive purpose. This is most obvious in the relations of men and women and parents and children. But it is true also in wider relations. It is true of large assemblies swayed by a strong common emotion, and even of a whole nation in times of stress. It is part of what makes the value of religion as a social institution. Where this feeling is wholly absent, other human beings seem distant and aloof. Where it is actively thwarted, other human beings become objects of instinctive hostility. The aloofness or the instinctive hostility may be masked by religious love, which can be given to all men regardless of their relation to ourselves. But religious love does not bridge the gulf that parts man from man: it looks across the gulf, it views others with compassion or impersonal sympathy, but it does not live with the same life with which they live. Instinct alone can do this, but only when it is fruitful and sane and direct. To this end it is necessary that instinctive cycles should be fairly often completed, not interrupted in the middle of their course. At present they are constantly interrupted, partly by purposes which conflict with them for economic or other reasons, partly by the pursuit of pleasure, which picks out the most agreeable part of the cycle and avoids the rest. In this way instinct is robbed of its importance and seriousness; it becomes incapable of bringing any real fulfilment, its demands grow more and more excessive, and life becomes no longer a whole with a single movement, but a series of detached moments, some of them pleasurable, most of them full of weariness and discouragement.
The life of the mind, although supremely excellent in itself, cannot bring health into the life of instinct, except when it results in a not too difficult outlet for the instinct of creation. In other cases it is, as a rule, too widely separated from instinct, too detached, too destitute of inward growth, to afford either a vehicle for instinct or a means of subtilizing and refining it. Thought is in its essence impersonal and detached, instinct is in its essence personal and tied to particular circumstances: between the two, unless both reach a high level, there is a war which is not easily appeased. This is the fundamental reason for vitalism, futurism, pragmatism, and the various other philosophies which advertise themselves as vigorous and virile. All these represent the attempt to find a mode of thought which shall not be hostile to instinct. The attempt, in itself, is deserving of praise, but the solution offered is far too facile. What is proposed amounts to a subordination of thought to instinct, a refusal to allow thought to achieve its own ideal. Thought which does not rise above what is personal is not thought in any true sense: it is merely a more or less intelligent use of instinct. It is thought and spirit that raise man above the level of the brutes. By discarding them we may lose the proper excellence of men, but cannot acquire the excellence of animals. Thought must achieve its full growth before a reconciliation with instinct is attempted.