Opposites are not contradictory but complementary. Niels Bohr
To contrast national solidarity and international cooperation as two opposites seems foolish to me. Gustav Stresemann
Light is meaningful only in relation to darkness, and truth presupposes error. It is these mingled opposites which people our life, which make it pungent, intoxicating. We only exist in terms of this conflict, in the zone where black and white clash. Louis Aragon
There are two kinds of truths: those of reasoning and those of fact. The truths of reasoning are necessary and their opposite is impossible; the truths of fact are contingent and their opposites are possible. Gottfried Leibniz
The most exciting attractions are between two opposites that never meet. Andy Warhol
Opposites attract. Latin Proverb