The readings address the issue of changing your mind and heart ... making a change so that our attitudes and behavior are in line with Jesus Christ.
It doesn't matter the life that you've lived. What matters is the life you are living now. If your life isn't in line with Jesus Christ then it's time to change it.
When we've done wrong and confess our sins, they are forgotten. God doesn't remember your past. If you've been living a life of disobedience, a life of pride, a life which is not in line with Jesus Christ, then it's time that you ask for God's forgiveness and help. Ask him to change your mind and heart. This starts with Reconciliation.
Some state, "I don't need to confess my sins. God already knows what I have done wrong. Why must I confess my sins to a priest?" You're not confessing to a priest. You are confessing to God. The priest is only there as a witness that you have confessed sincerely and to tell you that your sins are forgiven.
Are you at peace with yourself? If not, it's time for a change of mind and heart. Let us begin with Reconciliation.