“When I see someone sad, I always think she is refusing something to Jesus.” - Blessed Mother Teresa.
Cathy of Alexandria has a beautiful reflection on venial sin and the grace of the Sacrament of Penance. Most Catholics realize venial sins, properly repented of, may be forgiven in many ways without Confession; through an act of contrition, Holy Communion, prayer, good works, etc.. However, it is good to confess venial sins in regular Confession, since the Sacrament itself is a source of actual graces, strengthening us to avoid sin in the future. Sacramental Confession is frequently the source of a deep interior joy which invigorates our generosity in the service of God.
Venial sin deprives us of many graces which could merit greater help from God, as well as hinder our growth in the love of God. Disregard of venial sins can become stepping stones to mortal sin, causing the soul to fall little by little through carelessness. The indifference generated by venial sin can weaken our will and discrenment in recognizing mortal sin. The Sacrament of Penance helps us correct this tendency, and is often the primary source for good spiritual direction in our spiritual life.
I want to go to Confession NOW!