"I am personally quite convinced that no matter what training or education I might have received, I could never have run a four-minute mile, discovered Gödel's theorems, composed a Beethoven quartet, or risen to any of other innumerable heights of human achievement. I feel in no way demeaned by these inadequacies. It is quite enough that I am capable, as I think any person of normal endowments probably is, of appreciating and in part understanding what others have accomplished, while making my own personal contributions in whatever measure and manner I am able to do so. Human talents vary considerably, within a fixed framework that is characteristic of the species and that permits ample scope for creative work, including the creative work of appreciating the achievements of others. This should be a matter for delight rather than a condition to be abhorred. Those who assume otherwise must be adopting the tacit premise that people's rights or social reward are somehow contingent on their abilities. As for human rights, there is an element of plausibility in this assumption in the single respect already noted: in a decent society, opportunities should conform as far as possible to personal needs, and such needs may be specialized and related to particular talents and capacities. My pleasure in life is enhanced by the fact that others can do many things that I cannot, and I see no reason to want to deny these people the opportunity to cultivate their talents, consistent with general social needs. Difficult questions of practice are sure to arise in any functioning social group, but I see no problem of principle."