It is possible to think that someone is right to do whatever serves his own ends, including murder, theft and deceit, and to admire his ruthlessness. But one cannot think that this is not morally wrong. The phrase 'morally wrong' is not meaningless. There are some things, such as those mentioned above, which would have to be so described by anyone who was not unaware of the meaning of the expression. That some things are morally wrong can be shown to be true, every bit as decisively as, for instance, it can be shown that snow is white. It is not true that every moral question is 'a matter of opinion', still less of taste, personal preference, or choice.