Suppose one statement claims that distance weakens affection. A later statement argues that separation increases the value of reunion and thus deepens affection.
The later statement reverses the earlier conclusion but also offers a reason for the reversal. This is a constructed illustration of qalb as a relationship between poetic meanings.
The literary question is whether the contrary proposition is intelligible and persuasive in its context. Simply negating a sentence is not necessarily a successful rhetorical reversal.