Had we not loved ourselves at all, we could never have been obliged to love anything. So that self-love is the basis of all love.
My mother's family is Christian: her father was a Baptist lay preacher, and her brother, in a leap of Anglican upward mobility, became a vicar in the Church of Wales. But my mother converted to Islam on marrying my father. She was not obliged to; Muslim men are free to marry ahl al-kitab, or people of the Book - among them, Jews and Christians.
I mean there are many, many people in all sorts of different countries who don't have a great life, who are subject to injustice. Are we obliged to take all of them who come here? I think the answer is 'Not necessarily.'
I was obliged to be industrious. Whoever is equally industrious will succeed equally well.
The state is obliged to fight corruption within the government.
People who cannot find time for recreation are obliged sooner or later to find time for illness.
So long as the laws remain such as they are today, employ some discretion: loud opinion forces us to do so; but in privacy and silence let us compensate ourselves for that cruel chastity we are obliged to display in public.
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.
One of the disadvantages of being a patrician is that occasionally you're obliged to act like one.
The development of quantum mechanics early in the twentieth century obliged physicists to change radically the concepts they used to describe the world.