No danger flowing from speech can be deemed clear and present unless the incidence of the evil apprehended is so imminent that it may befall before there is an opportunity for full discussion. Only an emergency can justify repression.
... fear breeds repression; that repression breeds hate; that hate menaces stable government; that the path of safety lies in the opportunity to discuss freely supposed grievances and proposed remedies; and that the fitting remedy for evil counsels is good ones.
Democracy rests upon two pillars: one, the principle that all men are equally entitled to life, liberty and the pursuit of happiness; and the other, the conviction that such equal opportunity will most advance civilization.