What is defence reaction?

Famous quotes containing the words defence and/or reaction:

    Education must have two foundations—morality as a support for virtue, prudence as a defence for self against the vices of others. By letting the balance incline to the side of morality, you only make dupes or martyrs; by letting it incline to the other, you make calculating egoists.
    —Sébastien-Roch Nicolas De Chamfort (1741–1794)

    Sole and self-commanded works,
    Fears not undermining days,
    Grows by decays,
    And, by the famous might that lurks
    In reaction and recoil,
    Makes flames to freeze, and ice to boil.
    Ralph Waldo Emerson (1803–1882)