“Constant practice devoted to one subject often prevails over both ability and skill.”
Adsiduus usus uni rei deditus et ingenium et artem saepe vincit.
Marcus Tullius Cicero Pro Balbo
https://archive.org/stream/probalbo00ciceuoft#page/n5/mode/2up
Variant translation: Constant practice given to one matter often conquers both genius and art.
Pro Balbo, section 45
