I have the suspect that "libra of libras" shouldn't be intended necessarily in its literal sense (of astrological sign), even if it were true. The symbol of the

I have the suspect that "libra of libras" shouldn't be intended necessarily in its literal sense (of astrological sign), even if it were true. The symbol of the libra is a scale, so the author is just saying, as made clear in the next period, that he usually keeps his moods and opinions very balanced between the positive and the negative, in contrast with the fully optimistic attitude he sees in the Americans.