on the one hand

On the one hand, it was quite a good bargain, but on the other hand, do we really need a second car?

1950, Bertrand Russell, acceptance speech for Nobel Prize in Literature I maintain, however, on the one hand, that there are few occasions upon which large bodies of men, such as politics is concerned with, can rise above selfishness, while, on the other hand, there are a very great many circumstances in which populations will fall below selfishness, if selfishness is interpreted as enlightened self-interest.