Efficacious Grace, o'course:
A special grant of Almighty God by which a soul incapable by its own natural resources of placing a certain action positively conducive to eternal salvation, is endowed with new powers, becomes an adequate principle for eliciting the act in question, and without being forced by the pressure of God's grace, freely but infallibly performs the salutary action which God by His help prompted and made possible.
--New Catholic Dictionary
Left: Efficacious grace at work. (Source--and whoa baby, it's a weird one.)
Right: Or, in honor of CMinor's experience, Efficacious grace at work II. (FYI: those are tomatoes, not blood.)
(The Zucchini Chronicles I, and II)