Ignorance is privation of knowledge due at some particular time
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic ignorance time
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

“The perfection of knowledge was an individual accident of our first parent, so far as he was established as the father and instructor of the whole human race. Therefore he begot children like himself, not in that respect, but only in those accidents which were natural or conferred gratuitously on the whole nature. Reply Obj. 2: Ignorance is privation of knowledge due at some particular time; and this would not have been in children from their birth, for they would have possessed the knowledge due to them at that time. Hence, no ignorance would have been in them, but only nescience in regard to certain matters.” source