Objection 1: It would seem that a man cannot sin first of all against the Holy Ghost, without having previously committed other sins. For the natural order requires that one should be moved to perfection from imperfection. This is evident as regards good things, according to Prov.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic perfection imperfection
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

“Hence considered in itself this sin is unpardonable, although God can pardon it. _______________________
FOURTH ARTICLE [II-II, Q. 14, Art. 4]
Whether a Man Can Sin First of All Against the Holy Ghost?
Objection 1: It would seem that a man cannot sin first of all against the Holy Ghost, without having previously committed other sins. For the natural order requires that one should be moved to perfection from imperfection. This is evident as regards good things, according to Prov. 4:18: "The path of the just, as a shining light, goeth forwards and increases even to perfect day." Now, in evil things, the perfect is the greatest evil, as the Philosopher states (Metaph. v, text. 21).” source