§ 2. If our conviction that Reality is a single systematic unity pervading and manifesting itself in lesser systematic unities is correct, we shall expect to find that some of the lesser systematic unities with which we have to deal in practical life and in the various sciences exhibit more of the full character of the whole to which they belong than others. The “points of view” from which each minor system reflects the whole, though all true, need not be all equally true. Though the whole, in a genuine system, must be present as a whole in every part, it need not be equally present in all; it may well _not_ be “_as_ full, _as_ perfect in a hair as heart.” To take a concrete example, a cluster of mass-particles, a machine, a living organism, and a human mind engaged in the conscious systematic pursuit of truth, are all to some degree or other systematic unities, and all to some degree, therefore, repeat the structure of the universal whole to which they all belong. But it does not follow that all manifest the structure of that whole with equal adequacy and fulness. Indeed, any philosophy which admits development as a genuine feature of the world-process must maintain that they do not, that the nature of the whole system of Reality is exhibited with infinitely greater adequacy and clearness in the working of the conscious mind than in the changes of configuration of the system of mass-particles or even the vital processes of the physical organism. In practical life, too, one of our most ineradicable convictions is that there are degrees of worth which coincide with degrees of the adequacy with which partial systems exhibit the nature of the larger wholes to which they belong. For instance, among the different mental systems which may be called my partial “selves,” there are some which I call “truer” than others, on the ground that they more fully reveal my whole character as an individual human being. My whole character undoubtedly appears in and determines all the subordinate systems which make up my mental life. Each of them _is_ the whole character in a special aspect, or as reacting upon a special system of suggestions, but some of them contain the whole in a more developed and explicit form than others. I am in one sense myself wherever I may be and whatever I may be doing, and yet I am “more myself” in health than in sickness, in the free pursuit of self-chosen studies than in the forced discharge of uncongenial tasks imposed on me by the necessity of earning an income.