To-day it is in human life as in plant life. Millions of precious seeds never achieve development because the ground on which they are cast is unfertile or is already occupied, and the young plant is thus deprived of air, light and nourishment. The same laws that apply to nature apply to human life. If a gardener or farmer would claim that a plant could not be perfected without having made an attempt to perfect it, his more enlightened neighbors would consider him a fool. They would hold the same opinion of him if he would refuse to interbreed one of his female domestic animals with a male of more perfect breed to obtain more perfect stock. There is no peasant to-day who is so ignorant not to recognize the advantage of a rational treatment of his vegetables, fruit, and cattle; whether his means allow the application of advanced methods is another question. Only in regard to humanity even educated people will not admit what they regard as an irrefutable law with the rest of the organic world. Yet one need not be a scientist to derive instructive observations from life. How is it that peasant children differ from city children? How is it that children of the wealthier classes are, as a rule, distinguishable from the children of the poor by facial and bodily traits and by mental qualities? It is due to the difference in their conditions of living and education. The one-sidedness of training for a certain profession leaves its particular imprint upon a person. As a rule a minister or a school teacher can easily be recognized by his bearing and the expression of his face, as also a military man, even in plain clothes. A cobbler is easily distinguished from a tailor, a carpenter from a locksmith. Twin brothers who greatly resembled each other in their youth, will show marked differences in a more advanced age if their occupations have been very different from one another; if, for instance, one is a manual laborer, say a blacksmith, and the other has studied philosophy. Heredity on the one hand and adaptation on the other, are decisive factors in human development as well as in the animal kingdom, and man, moreover, is the most adaptive of all creatures. Sometimes a few years of a different mode of life and a different occupation suffice to alter a person completely. External changes are never more clearly seen than when a person is transplanted from poor and narrow circumstances to greatly improved ones. His past can perhaps be disavowed least in his mental culture. When people have attained a certain age, they frequently have no ambition for intellectual improvement, and often they do not need it either. A parvenu rarely suffers from this shortcoming. In our day money is the chief asset, and people bow far more readily before the ~man with a great fortune than before the man of knowledge and great intellectual abilities, especially if it is his ill fortune to be poor~. The worship of Mammon was never greater than in our day. Yet