In the preceding chapters I have discussed the public and social relations of classes, and those social topics in which groups of persons are considered as groups or classes, without regard to personal merits or demerits. I have relegated all charitable work to the domain of private relations, where personal acquaintance and personal estimates may furnish the proper limitations and guarantees. A man who had no sympathies and no sentiments would be a very poor creature; but the public charities, more especially the legislative charities, nourish no man's sympathies and sentiments. Furthermore, it ought to be distinctly perceived that any charitable and benevolent effort which any man desires to make voluntarily, to see if he can do any good, lies entirely beyond the field of discussion. It would be as impertinent to prevent his effort as it is to force co-operation in an effort on some one who does not want to participate in it. What I choose to do by way of exercising my own sympathies under my own reason and conscience is one thing; what another man forces me to do of a sympathetic character, because his reason and conscience approve of it, is quite another thing. What, now, is the reason why we should help each other? This carries us back to the other illustration with which we started. We may philosophize as coolly and correctly as we choose about our duties and about the laws of right living; no one of us lives up to what he knows. The man struck by the falling tree has, perhaps, been careless. We are all careless. Environed as we are by risks and perils, which befall us as misfortunes, no man of us is in a position to say, "I know all the laws, and am sure to obey them all; therefore I shall never need aid and sympathy." At the very best, one of us fails in one way and another in another, if we do not fail altogether. Therefore the man under the tree is the one of us who for the moment is smitten. It may be you to-morrow, and I next day. It is the common frailty in the midst of a common peril which gives us a kind of solidarity of interest to rescue the one for whom the chances of life have turned out badly just now. Probably the victim is to blame. He almost always is so. A lecture to that effect in the crisis of his peril would be out of place, because it would not fit the need of the moment; but it would be very much in place at another time, when the need was to avert the repetition of such an accident to somebody else. Men, therefore, owe to men, in the chances and perils of this life, aid and sympathy, on account of the common participation in human frailty and folly. This observation, however, puts aid and sympathy in the field of private and personal relations, under the regulation of reason and conscience, and gives no ground for mechanical and impersonal schemes. We may, then, distinguish four things: