The classic meaning of piety is devotion to God. Piety seeks that which is divine in others. Piety is a grace that brings out our spiritual instincts, such as sensing that someone is in need of kindness or nurturing. It is a grace that draws us to interact with those in need and to give generously to those who in an earlier time would have been viewed as competitors.
Another expression of the grace of Piety is to want to give the best of your inner resources to help "illuminate" another who turns to you for guidance.
You call on Piety when you feel yourself slipping into a dark power play with another person, or when you fear that you are becoming contaminated by negative thoughts about others.
The grace of Piety immediately shifts how you view another, enabling you to see with a softer heart.