At very best, a person wrapped up in himself makes a small package.

A very similar statement has become attributed to Benjamin Franklin, but apparently only in recent decades: "A man wrapped up in himself makes a very small bundle." This seems to have been first attributed to Franklin in The New Age Magazine Vol. 66 (1958), and the earliest appearance of it yet located is in Coronet magazine, Vol. 34 (1953), p. 27, where it was attributed to a Louise Stein.