In the present life one man's thought is not known by another owing to a twofold hindrance
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic hindrance present
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/17611/pg17611-images.html

Context

“because a man who has a habit of knowledge, or any intelligible species, uses them at will. Hence the Apostle says (1 Cor. 2:11) : "For what man knoweth the things of a man, but the spirit of a man that is in him?" Reply Obj. 1: In the present life one man's thought is not known by another owing to a twofold hindrance; namely, on account of the grossness of the body, and because the will shuts up its secrets. The first obstacle will be removed at the Resurrection, and does not exist at all in the angels; while the second will remain, and is in the angels now.” source