I will take four characteristics which seem to me jointly to form the basis of an ideal character; vitality, courage, sensitiveness and intelligence. I do not suggest that this list is complete, but I think it carries us a good way. Moreover, I firmly believe that, by proper physical, emotional and intellectual care of the young, these qualities could all be made very common.
Source: On Education, especially in early childhood, 1926, chap. 2 The Aims of Education