On Liberty

...It will probably be conceded that it is desirable people should exercise their understandings, and that an intelligent following of custom, or even occasionally an intelligent deviation from custom, is better than a blind and simply mechanical adhesion to it. To a certain extent it is admitted, that our understanding should be our own but there is not the same willingness to admit that our desires and impulses should be our own likewise; or that to possess impulses of our own, and of any strength, is anything but a peril and a snare. Yet desires and impulses are as much a part of a perfect human being, as beliefs and restraints and strong impulses are only perilous when not properly balanced; when one set of aims and inclinations is developed into strength, while others, which ought to co-exist with them, remain weak and inactive. It is not because mens desires are strong that they act ill; it is because their consciences are weak. There is no natural connection between strong impulses and a weak conscience. The natural connection is the other way...