Answer:
He thinks very highly of his wife
he considers himself to be a role model for others
He feels no regret for his actions
Step-by-step explanation:
Story of Griselda is a folklore in European folklore who noted for her patience and obedience. She is depicted in works of many famous European writers such as Boccacio's Griselda Tale, in Petrarch's Historia Griseldis, Chaucer's The Clerk's Tale, William Shakespeare's play The Winter's Tale has many elements of the Griselda's tale. and recently (1982) Caryl Churchill's play Top Girls.
Gualtieri's thinking very highly of his wife is shown by his acknowledging "thou see the reward of thy long patience"
His considering himself a role model for others is shown by his remarks "and they in like manner might learn how to take and keep a wife"
His feeling no regret for his actions is shown by his remarks "what I did was done of purpose aforethought, for that I was minded to give both thee and them a lesson"
His self-righteousness is not obvious from this excerpt, even if there are some elements of it, they are because his considering himself a role model for other, and because of his no regret for his actions. Self-righteous person claims or shows that he/she is totally correct and morally superior to others, it is like boasting oneself for one's actions.