I. The Sources of Morality

From The Catechism of the Catholic Church

1753
A good intention (for example, that of helping one’s neighbor) does not make
behavior that is intrinsically disordered, such as lying and calumny, good or
just. the end does not justify the means. Thus the condemnation of an innocent
person cannot be justified as a legitimate means of saving the nation. On the
other hand, an added bad intention (such as vainglory) makes an act evil that,
in and of itself, can be good (such as almsgiving).³⁹

PART THREE: LIFE IN CHRIST

SECTION ONE MAN’S VOCATION LIFE IN THE SPIRIT
- CHAPTER ONE THE DIGNITY OF THE HUMAN PERSON
  - Article 4 THE MORALITY OF HUMAN ACTS
    - I. The Sources of Morality

From The Catechism of the Catholic Church – rosary.team