We are disturbed, and lose our presence of mind, when we are confronted by the presence of a superior power.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic power presence
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/19950/pg19950-images.html

Context

“but because the senses are the principle of human knowledge, the greatest certainty is in them, for the principles of knowledge must needs always be most certain. Consequently Joseph, to whom the angel appeared in his sleep, did not have so excellent a vision as the Blessed Virgin. Reply Obj. 3: As Ambrose says on Luke 1:11: "We are disturbed, and lose our presence of mind, when we are confronted by the presence of a superior power." And this happens not only in bodily, but also in imaginary vision. Wherefore it is written (Gen. 15:12) that "when the sun was setting, a deep sleep fell upon Abram, and a great and darksome horror seized upon him."” source