Sentences or verses in sequence with the same construction, so that the reader compares what changes from one to the next.
In Dom Casmurro
I do not blame the man; for him, the most important thing at that moment was the son. But do not blame me either; for me, the most important thing was Capitu.
The two sentences, "I do not blame the man; for him..." and "But do not blame me either; for me...," repeat the same construction and make plain what changes: the son on one side, Capitu on the other.
Chapters LXXVIII to XCII: Secret for Secret and the Death of Manduca, the narrator