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There comes a point when a man must refuse to answer to his leader if he is also to answer to his own conscience.

The problem is that no ethical system has ever achieved consensus. Ethical systems are completely unlike mathematics or science. This is a source of concern.

A man is truly ethical only when he obeys the compulsion to help all life which he is able to assist, and shrinks from injuring anything that lives.

A man without ethics is a wild beast loosed upon this world.

I believe that we as the leader of the Free World must provide important leadership on the ethical parameters, the ethical constraints that this research requires.

He who has a task to perform must know how to take sides, or he is quite unworthy of it.

I don't think there's anything in the compromise that means that there's a clash of ethics.

Ethics is nothing else than reverence for life.

An act has no ethical quality whatever unless it be chosen out of several all equally possible.