Stagnant water soon grows putrid; a soul left at ease, without any struggle or temptation, stands in great danger of perishing from some self-conceit of her own merit; she perhaps imagines herself to have already attained to perfection, and therefore has little fear; and consequently takes little pains to recommend herself to God and to secure her salvation; but when, on the contrary, she is agitated by temptations, and sees herself in danger of rushing headlong into sin, then she has recourse to God; she goes to the divine Mother; she renews her resolution rather to die than to sin; she humbles herself, and casts herself into the arms of the divine mercy: in this manner, as experience shows us, the soul acquires fresh strength and closer union with God.
--St. Alphonsus Liguori, The Holy Eucharist
