Roman Catechism 19.132

Chapter 19 — Part II: The Sacraments — Penance

Section 132. Those Who Are Ashamed To Confess Their Sins Should Be Instructed — Still more pernicious is the fault of those who, yielding to a foolish bashfulness, cannot induce themselves to confess their sins. Such persons are to be encouraged by exhortation, and are to be reminded that there is no reason whatever why they should fear to disclose their sins, that to no one can it appear surprising if persons fall into sin, the common malady of the human race and the natural consequence of human infirmity.