Something happens to a man when he puts on a judicial robe, and I think it ought to. The change is very great and requires psychological change within a man to get into an attitude of deciding other people's controversies, instead of waging them. It really calls for quite a changed attitude. Some never make it - and I am not sure I have.
Reported in Leon Friedman and Fred L. Israel, 4 The Justices of the United States Supreme Court 1789-1969, 2563 (1969) - Books and articles