Others, on the contrary, are born with a feeble constitution; they are weak, delicate, they cannot bear trials the same as the others. This is a first difference, and this difference, you well know, may be subdivided into a multitude of others; for there are no two individuals equally healthy, equally strong. What will be the natural result? This, for example: that where strength is required (and every one needs more or less physical strength to accomplish certain heavy works), the strongest will have the advantage over the others; and, after a certain time, of two men who started at the same time, under the same conditions, with equal moral advantages, one, owing to his physical strength, shall have accomplished a great deal, and the other less; one shall have earned much, the other little: their career is unequal. But it is not always the greater physical strength and health which determine in man his capacity for work; and it is a notable fact, and a matter upon which it is well to insist, namely, that all differences are compensated for, balance themselves, so to say; that such a one, for example, who, in some respect and from a certain point of view, may be inferior to another, may from another standpoint be superior to him; which, again, is as much as to say that there are no classes in society; for if the one who in one respect is inferior to his fellow-man, is in another superior to him, they are equals. In the class called the laboring class, for example, we see every day that it is not always the strongest and the healthiest that produce the largest amount of work; and love of work is a notable factor in this scale of physical strength, making the balance pretty even. For some delicate men are industrious, whilst others who are stronger are not; some have a natural liking for their work, whilst others again have not. Hence a difference in the character of their work, and, consequently, in the remuneration of it. A third difference is that of the _intelligence_. All men have received from nature a special gift which distinguishes them from the animals, and which we call intelligence; but they have not received it all to the same degree. Not all men have the same intellectual faculties, and every one knows how great an element of success intelligence is in all functions, in all departments of human activity, even in those requiring above all physical strength and the use of the hands. It is well known that even the latter find in intelligence their best auxiliary; that it procures them an invaluable advantage, even over those whose physical strength, facility, ardor, tenacity in work, would seem to forestall all rivalry.