Such faults of character may of course be attributed to a nervous disposition or a natural modesty. People of Khayyam's temperament are not naturally witty or at ease in company. Finding no pleasure in society, they tend to withdraw into themselves and seek refuge in study. It might also be that their preoccupation with scientific matters and the solution of mathematical problems leaves them no time for the commonplaces of social intercourse. In our own time we have the examples of the great scientist Einstein and the brilliant thinker Bernard Shaw. It is said that the latter was once asked why he took no part in social life and he replied that he could find no pleasure in associating with stupid people.