Even more broadly, he spoke to two of the definingprinciples both of the Civil Rights era and the entire history of this nation - hard work, and faith.
Artists since the 1960s have systematically questioned (or undermined) the principles that were once defining traits of photography, especially its veracity.
Even the abstract principles being fought over in this budget round are not the defining issues separating libertarians, conservatives and liberals on the question of whither goest the American welfare state and the military-industrial complex.