VATICAN CITY (CNS) – The confessional is a place where one can go to humbly seek forgiveness; it is not a dry cleaners where one goes to remove the occasional stain, Pope Francis said.

While forgiveness is “God’s great work of mercy,” Christians can take for granted the power of the sacrament of reconciliation and confess while being “unable to be ashamed” of their sins, the pope said March 21 in his homily during morning Mass at Domus Sanctae Marthae.

“You did not go there ashamed of what you did. You saw some stains on your conscience and you were mistaken because you believed the confessional was a dry cleaners to remove stains,” he said.

Reflecting on the day’s first reading from the prophet Daniel in which the people of Israel humbly beg God to pardon their sins, the pope said shame was “the first step” in seeking forgiveness.

However, he noted, the Gospel reading from St. Matthew recounts Jesus’ parable of the ungrateful servant who, although forgiven of a debt, refused to show the same mercy to another.

While forgiveness is “a difficult mystery” to comprehend, the Gospel helps Christians understand that going to confession is more than just making some kind of “bank transaction,” the pope said.

“If you are not aware of being forgiven you will never be able to forgive, never,” he said. “There is always that attitude of wanting to take others to task. Forgiveness is total. But it can only be done when I feel my sin, when I am ashamed and ask forgiveness of God and feel forgiven by the father so I can forgive.”