
When once the light of Divine Providence has illumined the believer’s soul, he is relieved and set free, not only from the extreme fear and anxiety which formerly oppressed him, but from all care. For as he justly shudders at the idea of chance, so he can confidently commit himself to God. This, I say, is his comfort, that his heavenly Father so embraces all things under his power – so governs them at will by his nod – so regulates them by his wisdom, that nothing takes place save according to his appointment; that received into his favour, and entrusted to the care of his angels neither fire, nor water, nor sword, can do him harm, except in so far as God their master is pleased to permit. For thus sings the Psalm, “Surely he shall deliver thee from the snare of the fowler, and from the noisome pestilence. He shall cover thee with his feathers, and under his wings shalt thou trust; his truth shall be thy shield and buckler. Thou shalt not be afraid for the terror by night; nor for the arrow that flieth by day; nor for the pestilence that walketh in darkness; nor for the destruction that wasteth at noonday. A thousand shall fall at thy side, and ten thousand at thy right hand; but it shall not come nigh thee” (Psa 91: 2-7).
John Calvin. The Institutes, 1.17.11.