Some moral philosophers address inequality by invoking principles of justice and fairness.
If one has a so-called value for life and is not in favor of euthanasia, one invokes principles to lead one to this conclusion.
Really, a war can only be justified if you can invoke the principles of self-defence.
As the Constitution endures, persons in every generation can invoke its principles in their own search for greater freedom.
In disputes over the construction and expansion of mosques in California, New York, Tennessee and elsewhere, supporters of the projects tend to invoke constitutional principles of religious freedom.
But to invoke those principles in order to protect the right of one of America's most powerful doctors to mislead millions of people seems a bit excessive.
The majority opinion ended by noting the genius of our Constitution: that "persons in every generation can invoke its principles in their own search for greater freedom".
The Constitution's due process guarantee was so expansive, he said, that "persons in every generation can invoke its principles in their own search for freedom".
"In particular, no lawyer can invoke the principles of lawyer-client privilege to excuse participation, whether as principal or accessory, in offences against the Commonwealth".
Anthony Kennedy, named to the Supreme Court by Ronald Reagan, eloquently observed in his majority decision in the sodomy case that "as the Constitution endures, persons in every generation can invoke its principles in their own search for greater freedom".
