Should one break in and free the animals? That is illegal, but the obligation to obey the law is not absolute. It was justifiably broken by those who helped runaway slaves in the American South, to mention only one possible parallel.

At present scientists do not look for alternatives simply because they do not care enough about the animals they are using.

The future of the world depends on how well we meet it.

Of all the arguments against voluntary euthanasia, the most influential is the slippery slope: once we allow doctors to kill patients, we will not be able to limit the killing to those who want to die.

Scholars have long dreamed of a universal library containing everything that has ever been written.

To give preference to the life of a being simply because that being is a member of our species would put us in the same position as racists who give preference to those who are members of their race.

To turn the other cheek is to teach would-be cheats that cheating pays.