Rollo May (an existential psychologist) said that one must have courage to create. One of the reasons courage is required is that many artists have threatened the status quo. That is to say that some artists have gone against some of society's traditional values and rules. The artist is in conflict with some aspect of society and therefore reproduces a contrary. May also claimed that creativity comes from such moments of contrariness or conflict. That is, creativity emerges when the artist (or inventor, or activist, etc.) is working against some limit or something that (i.e. a contrary) opposes him/her.
Karl Marx was another thinker/author who believed that social progress emerged from the dialectical conflict of social classes. A dialectic is a contrary in which a thesis works with/against an antithesis and a synthesis is produced.
In "Preface to Lyrical Ballads," Wordsworth talks about the balance of restraint and passion (which could be compared to the stability and energy of heaven and hell respectively).
More generally speaking, you can look for other authors who write about conflicting ideas, oppositions, or contraries. There are plenty to choose from, including other Romantic poets. In "The Rime of the Ancient Mariner," Coleridge uses the contrary of destruction and regeneration. The mariner's tale, his responsibility to teach this moral that everything in nature has value, is created at the destruction of the albatross.
Since then, at an uncertain hour,
That agony returns:
And till my ghastly tale is tole,
This heart within me burns.