O could I flow like thee, and make thy streamMy great example, as it is my theme!Though deep yet clear, though gentle yet not dull;Strong without rage, without o'erflowing full.
Could someone please illustrate what heroic couplets is? I got the definition from Wikipedia, but I am still in the dark. Thank you very much.

A heroic couplet is a traditional form for English poetry, commonly used for epic and narrative poetry; it refers to poems constructed from a sequence of rhyming pairs of iambic pentameter lines. The rhyme is always masculine.
Heroic couplet - Wikipedia, the free encyclopedia