But we are conscious that there are evils and dangers in the background greater still, which are not appreciated, because they are either concealed or suppressed.

What a condition of man would that be, in which human passions were controlled by no authority, divine or human, in which there was no shame or decency, no higher affection overcoming or sanctifying the natural instincts, but simply a rule of health! Is it for this that we are asked to throw away the civilization which is the growth of ages?
For strength and health are not the only qualities to be desired; there are the more important considerations of mind and character and soul.

We know how human nature may be degraded; we do not know how by artificial means any improvement in the breed can be effected.

The problem is a complex one, for if we go back only four steps (and these at least enter into the composition of a child), there are commonly thirty progenitors to be taken into account.

Many curious facts, rarely admitting of proof, are told us respecting the inheritance of disease or character from a remote ancestor.