Any limitation of the spirit would annihilate its liberty. The slave is such because his will is constrained within the bounds imposed upon it by the master's volition. The human spirit is not free in the presence of nature because nature envelops it and enfolds it within narrow confines, which allow only a certain development; and this development therefore cannot be looked upon as a grant of nature but rather as a condemnation, in that it marks out boundaries which cannot be trespassed. The lower animal is not free because even if its actions seem to imply a rationality not very different from that of man, yet in reality its acts, differently from the doings of man, follow the straight line pre-established by instinct, which admits of no original power and allows no individual creation. If there is a limit, there must be something limiting and something limited; there must be a necessary relationship of one to the other, so that the thing limited can in no way free itself from the consequences of this relationship. These consequences are summed up in the impossibility of _being all_, or in other words in the necessity of remaining within limits, and to obey therefore the untransgressable laws set by one's own nature. This necessity which binds every natural being to the laws of its own nature, this impossibility of being aught else than what is appointed by nature, to be a wolf of necessity, and of necessity to be a lamb; this is the hard lot of natural beings, this is the destiny from which man is ransomed by the power of his freedom.