Any time you stop looking at evil as a black and white thing, it's helpful. So the fact that there won't be any obligatory Islamic terrorist stereotypes in movies any more, that'd be helpful. John Cusack
Ships are obliged to take on harbor or river pilots - who provide specialized local navigation - when they approach a port, but in the canal, a Suez crew is also obligatory. The crew members are there in case the ship needs to be moored during the canal transit, but this rarely happens. Rose George
Every judgement of conscience, be it right or wrong, be it about things evil in themselves or morally indifferent, is obligatory, in such wise that he who acts against his conscience always sins. Thomas Aquinas
Summer is not obligatory. We can start an infernally hard jigsaw puzzle in June with the knowledge that, if there are enough rainy days, we may just finish it by Labor Day, but if not, there's no harm, no penalty. We may have better things to do. Nancy Gibbs
We are all happy when U.S. soldiers are killed week in and week out. The killing of U.S. soldiers in Iraq is legitimate and obligatory. Walid Jumblatt