Is not the answer prompt and decisive in favor of that system which most completely protects the prisoner from the pernicious influence of brethren in guilt? It is a venerable proverb, that a man is known by the company he keeps; and this is a homely expression of the truth, that the character of a man is naturally in harmony with those about him. If the society about him is virtuous, his own virtues will be confirmed and expanded; on the other hand, if it be wicked, then will the demon of his nature be aroused. Bad qualities, as well as good, are quickened and strengthened under the influence of society. Every association of prisoners must pervert, in greater or less degree, but can never reform, those of whom it is composed. The obdurate offender, perpetually brooding on evil, even though he utter no audible word, will impart to the congregation something of his own hardness of heart. Are we not told by the poet, that sheep and swine take contagion from one of their number, and even a grape is spoiled by another grape? "Dedit hanc contagio labem, Et dabit in plures; sicut grex totus in agris Unius scabie cadit, et porrigine porci, _Uvaque conspecta livorem ducit ab uva_."[123] [123] Juv., Sat. II. 78-81. From the inherent nature of things, this contagion must be propagated by the Congregate system, while the Separate system does all that man can do to restrain it. By the latter, as successfully administered, the prisoner is, in the first place, withdrawn, so far as possible by human means, from all bad influences, while, in the second place, he is brought under the operation of good influences. The mind is naturally diverted from thick-coming schemes of crime, and turned to thoughts of virtue. What in it is bad, if not entirely subdued, is weakened by inactivity, while the good is prompted to constant exercise. It cannot be questioned, then, on grounds of reason, independent of experience, that the Separate system is better calculated to promote that great object of Prison Discipline, the reformation of the offender. With this recommendation alone it would be entitled to the regard of all who feel that the return of a single sinner is blessed.