Good preparation for the sacrament of Penance involves examining what sins you may have. It is worth returning to this question again and again, constantly working on one's personality, mastery of temptation, and understanding of the core of Christian living. Therefore, care should be taken to ensure that this list is not a repetitive, mindlessly duplicated item recited from memory each time one meets with a confessor.
First of all, it is worth remembering that Holy Confession takes place before By God. The believer comes to ask for absolution and penance - contrite, full of responsibility for his own deeds and with a desire to improve. Therefore, the list of sins to be confessed is by no means a universal message. During the preparation for First Holy Communion, each child He holds the "Treasury" in his hands. In it, besides prayers, you can find many hints concerning light and heavy sins. It is good to return to this little book many times as an adult, looking for our weaknesses and analyzing our daily life between confessions. Sloth, hubbyforgetting Mass, lying, violence and many other negative things in our lives require confession. However, for each person this "list" of unworthy things is different, individual.
One of the greatest mistakes a person can make while receiving the sacrament of Penance is to make a list of sins for confession in haste, often while already talking to the priest in the confessional. Meanwhile, it is reasonable even to write them down beforehand, to discuss them with one's self, to look for possible solutions yet before absolution and, above all, a sense of deep regret related to all these transgressions.