About erasing sins and gaining wisdom:

1 Corinthians 1:30 But of him are ye in Christ Jesus, who of God is made unto us wisdom, and righteousness, and sanctification, and redemption� (KJV)

Psalm 38:4 My guilt has overwhelmed me like a burden too heavy to bear. (KJV)

Indeed, one of penalties of sin is guilt. However, guilt can be a good thing when we accept Christ and we see we went against His will and against His desire for our life. Christ came to give you freedom. He came to give you freedom and a cleansing of your soul. So although it might be difficult to understand, Christ came to erase your sins of the past. What God wants is a great turnaround in your life as a result of His big eraser. In turning your life around God also wants you to gain wisdom from your sins. In gaining wisdom from your past, you are more able to achieve victory. One of God's victories in you and through you is your gaining wisdom from your sins and from the guilt of your past. Carrying the burden of guilt upon your soul is of no value unless you gain wisdom. Nothing in the past is of value unless you gain wisdom. Even when you are old, when you know without a doubt your days are numbered and your time is getting short, looking back is easier but not productive unless you gain wisdom. What will you say when God asks you about the wisdom you gained when you were 82? Will you say, "I didn't gain any wisdom, I was retired?"