In the Catholic tradition, the sacrament of Confirmation is conferred when an individual is prepared to think and act as a mature Christian. Similar to Baptism, we are anointed in Confirmation and sealed with the mark of the Holy Spirit.
Just as when we move from adolescence to adulthood, there are new expectations and responsibilities, so too when we are confirmed there are new expectations and responsibilities. Confirmation parallels our maturation as humans and indicates that we are now able to think and act as adults in Faith.
As adults, we are responsible for our own growth and actions, so too after confirmation we are accountable to continue to learn and grow throughout the course of our lives. The grace we receive strengthens us to a new level of maturity, to take responsibility for our own spiritual growth and to enable us to lead others in the Faith.
By living our lives as adult Christians, we show our attitude of gratitude by shouldering our responsibilities and leading others to Christ.