The character of life that has permitted people to unite egoism and altruism to a certain degree is that which is called moral fecundity. It is necessary that individual life should diffuse itself for another, in another, and if need be, give itself. This diffusion is not contrary to nature, in fact, it is according to nature, and as such, it is the very condition of true life. This same concept is true of intelligence no less than of the body as it is impossible to confine intelligence within itself as it is like a flame that is made to radiate. There is the same diffusive force in people's sensibility, such as having to share joy and share grief. It is the whole nature that is sociable.
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