The Stoics formalized a belief in Greek philosophy called “Antakolouthia” or the mutual entailment of the virtues.
By this view, no virtue is a virtue by itself. They all include an opposite quality, and overusing a specific strength turns it into a liability.
Confidence untempered by humility, for example, turns into arrogance.
Courage without prudence becomes recklessness.
Tenacity unmediated by flexibility congeals into rigidity.
Honesty in the absence of compassion is cruelty.