While there is something to be said for accompanying our prayers with promotion of devotion, we must also be careful of turning prayer to superstition. Even, and especially, if they refer to “God,” “Angels,” or Saints (Therese seems to be particularly a victim of this), emails/memes/etc. that make “promises” if you share them and/or, worse, threats if you don’t constitute violations of the First Commandment, per the Catechism:
2111 Superstition is the deviation of religious feeling and of the practices this feeling imposes. It can even affect the worship we offer the true God, e.g., when one attributes an importance in some way magical to certain practices otherwise lawful or necessary. To attribute the efficacy of prayers or of sacramental signs to their mere external performance, apart from the interior dispositions that they demand, is to fall into superstition.41
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2116 All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to “unveil” the future.48 Consulting horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums all conceal a desire for power over time, history, and, in the last analysis, other human beings, as well as a wish to conciliate hidden powers. They contradict the honor, respect, and loving fear that we owe to God alone.
2117 All practices of magic or sorcery, by which one attempts to tame occult powers, so as to place them at one’s service and have a supernatural power over others – even if this were for the sake of restoring their health – are gravely contrary to the virtue of religion. These practices are even more to be condemned when accompanied by the intention of harming someone, or when they have recourse to the intervention of demons. Wearing charms is also reprehensible. Spiritism often implies divination or magical practices; the Church for her part warns the faithful against it. Recourse to so-called traditional cures does not justify either the invocation of evil powers or the exploitation of another’s credulity.
2118 God’s first commandment condemns the main sins of irreligion: tempting God, in words or deeds, sacrilege, and simony.
2119 Tempting God consists in putting his goodness and almighty power to the test by word or deed. Thus Satan tried to induce Jesus to throw himself down from the Temple and, by this gesture, force God to act.49 Jesus opposed Satan with the word of God: “You shall not put the LORD your God to the test.”50 The challenge contained in such tempting of God wounds the respect and trust we owe our Creator and Lord. It always harbors doubt about his love, his providence, and his power.51
2120 Sacrilege consists in profaning or treating unworthily the sacraments and other liturgical actions, as well as persons, things, or places consecrated to God. Sacrilege is a grave sin especially when committed against the Eucharist, for in this sacrament the true Body of Christ is made substantially present for us.52