In general something like "впадать в крайности" or "доводить до крайности". In your particular case I would say "такое личное качество, как xxx, опасно, если доведено до крайности". Still, the sentence in general, looks pretty awkward to me. Probably someone will come up with a better sentence construction.
no subject
Date: 2006-02-10 03:20 am (UTC)Still, the sentence in general, looks pretty awkward to me. Probably someone will come up with a better sentence construction.
xxx, доведённое до крайности, опасно.
Date: 2006-02-10 04:15 am (UTC)xxx, доведённое до крайности, опасно. For example:
Храбрость, доведённая до крайности, опасна.