More fundamentally, however, the answer to petitioners' objection is that there can be no impairment of executive power, whether on the state or federal level, where actions pursuant to that power are impermissible under the Constitution. Where there is no power, there can be no impairment of power.

If a policeman must know the Constitution, then why not a planner?

The calculated killing of a human being by the state involves, by its very nature, an absolute denial of the executed person's humanity. The most vile murder does not, in my view, release the state from constitutional restraint on the destruction of human dignity.

The law is not an end in itself, nor does it provide ends. It is preeminently a means to serve what we think is right.

More fundamentally, however, the answer to petitioners' objection is that there can be no impairment of executive power, whether on the state or federal level, where actions pursuant to that power are impermissible under the Constitution. Where there is no power, there can be no impairment of power.

The door of the Free Exercise Clause stands tightly closed against any government regulation of religious beliefs as such. Government may neither compel affirmation of a repugnant belief, nor penalize or discriminate against individuals or groups because they hold views abhorrent to the authorities.

Death is not only an unusually severe punishment, unusual in its pain, in its finality and in its enormity, but is serves no penal purpose more effectively than a less severe punishment.