Whatever You Would Make Habitual, Practise It; And If You Would Not
Make A Thing Habitual, Do Not Practise It, But Habituate Yourself
To Something Else.
Whatever you would make habitual, practise it; and if you would not
make a thing habitual, do not practise it, but habituate yourself
to something else.
-- Epictetus (c. 60 AD)
-- How the Semblances of Things are to be combated,
-- Discourses, Book ii, Chap. xviii