"In Magna Carta it is more than once insisted on as the principal bulwark of our liberties; but especially by chap. 29. that no freeman shall be hurt… - William Blackstone

Of great importance to the public is the preservation of this personal liberty; for if once it were left in the power of any the highest magistrate to imprison arbitrarily whomever he or his officers thought proper, (as in France it is daily practised by the crown,) there would soon be an end of all other rights and immunities. Some have thought that unjust attacks, even upon life or property, at the arbitrary will of the magistrate, are less dangerous to the commonwealth than such as are made upon the personal liberty of the subject. To bereave a man of life, or by violence to confiscate his estate, without accusation or trial, would be so gross and notorious an act of despotism, as must at once convey the alarm of tyranny throughout the whole kingdom; but confinement of the person, by secretly hurrying him to jail, where his sufferings are unknown or forgotten, is a less public, a less striking, and therefore a more dangerous engine of arbitrary government.

Of crimes injurious to the persons of private subjects, the most principal and important is the offense of taking away that life, which is the immediate gift of the great creator; and which therefore no man can be entitled to deprive himself or another of, but in some manner either expressly commanded in, or evidently deducible from, those laws which the creator has given us; the divine laws, I mean, of either nature or revelation.

That the king can do no wrong, is a necessary and fundamental principle of the English constitution.