What now is meant by there being no limit to human growth? If by it is meant individual growth, the reply is that there is actually a very sharp limit set to growth, much sharper than the average person seems to be aware of. It is quite clear that the individual is not capable of unlimited growth in this world. There are degrees of capacity in different individuals which will determine what amount of development each is capable of. Capacity is not an acquired thing, it is an endowment, and the child born with the brain capacity of a fool will remain a fool to the end, however much his folly may be disguised or lost amid the folly of others. And with each one, whether he be fool or genius, acquisitions are made more easily and more rapidly in youth, the power of mental adaptation is much greater in early than in later life, while in old age the capacities of adaptation and acquisition become negligible quantities. And provided one lives long enough, the last stage sees, not a promise of further progress if life were continued, but a process of degradation. The old saying that one can't put a quart into a pint pot is strictly applicable here. Growth assumes acquisition; acquisition is determined by capacity, and this while an indefinite quantity (indefinite here is strictly referable to our ignorance, not to the actual fact) is certainly not an unlimited one. Life, then, so far as the individual is concerned, does not point to unlimited growth. It indicates, so far as it indicates anything at all, that there is a limit to growth as to all other things. Well, but suppose we say that man is capable of indefinite growth, what do we mean? Let us also bear in mind at this point that we are strictly concerned with the individual. For if man survives death he must do it as an individual. To merely survive as a part of the chemical and other elements of the world, or, to follow some mystical theologians, as an indistinguishable part of a "world-soul," is not what people mean when they talk of living beyond the grave. Here, again, it will be found that we have confused two quite distinct things, even though the one thing borrows its meaning from the other.