Pardon without repentance negates justice. They know they are in need of healing, not just physical, but spiritual healing as well. They approach Jesus with contrition and faith because they believe that he can release the burden of guilt and suffering and make restoration of body and soul possible. Their request for mercy is both a plea for pardon and release from suffering. Jesus gives mercy to all who ask with faith and contrition.
Gratefulness is related to g race which means the release of loveliness .
Gratitude is the homage of the heart which responds with graciousness in expressing an act of thanksgiving. The Samaritan approached Jesus reverently and gave praise to God. If we do not recognize and appreciate the mercy shown us we will be ungrateful. Ingratitude is forgetfulness or a poor return for kindness received. Ingratitude easily leads to lack of charity and intolerance towards others.