Selected Works of Voltairine de Cleyre

There are two spirits abroad in the world, -the spirit of Caution, the spirit of Dare, the spirit of Quiescence, the spirit of Unrest; the spirit of Immobility, the spirit of Change; the spirit of Hold-fast-to-that-which-you-have, the spirit of Let-go-and-fly-to-that-which-you-have-not; the spirit of the slow and steady builder, careful of its labors, loath to part with any of its achievements, wishful to keep, and unable to discriminate between what is worth keeping and what is better cast aside, and the spirit of the inspirational destroyer, fertile in creative fancies, volatile, careless in its luxuriance of effort, inclined to cast away the good together with the bad. Society is a quivering balance, eternally struck afresh, between these two.
Those who look upon Man, as most Anarchists do, as a link in the chain of evolution, see in these two social tendencies the sum of the tendencies of individual men, which in common with the tendencies of all organic life are the result of the action and counteraction of inheritance and adaptation. Inheritance, continually tending to repeat what has been, long, long after it is outgrown; adaptation continually tending to break down forms.
The same tendencies under other names are observed in the inorganic world as well, and anyone who is possessed by the modern scientific mania for Monism can easily follow out the line to the vanishing point of human knowledge.