Science begets and nourishes faith, by way of external persuasion afforded by science; but the chief and proper cause of faith is that which moves man inwardly to assent.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic persuasion science
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/18755/pg18755-images.html

Context

“But this is false, for, since man, by assenting to matters of faith, is raised above his nature, this must needs accrue to him from some supernatural principle moving him inwardly; and this is God. Therefore faith, as regards the assent which is the chief act of faith, is from God moving man inwardly by grace. Reply Obj. 1: Science begets and nourishes faith, by way of external persuasion afforded by science; but the chief and proper cause of faith is that which moves man inwardly to assent. Reply Obj. 2: This argument again refers to the cause that proposes outwardly the things that are of faith, or persuades man to believe by words or deeds. Reply Obj. 3: To believe does indeed depend on the will of the believer:” source