St. Faustina
“However, in all these sufferings and struggles, I was not omitting Holy Communion. When it seemed to me that I should not communicate, I went, before Holy Communion, to the Directress and told her that I could not approach the Sacrament, because it seemed to me that I should not do so. But she would not permit me to omit Holy Communion, so I went, and I understand now that it was only obedience that saved me. The Directress herself told me later that my trials had passed quickly, ‘and this solely because you were obedient, Sister; and it was through the power of obedience that you struggled through this so bravely.'”
Source: St. Faustina, Diary: Divine Mercy in My Soul