Related:

• 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....
• Difficulties are things that show what men are. -- Epictetus (c.
  60 AD) -- Discourses, Book i, Chap. xxiv...
• If what the philosophers say be true,--that all men's actions proceed from one source
  hat as they assent from a persuasion that a thing is so, and dissent from a persuasion that it is not, and suspend their judgment from a persuasion that it is uncertain,--so likewise they seek a thing from a persuasion that it is for their advantage....
• Every habit and faculty is preserved and increased by correspondent actions,--as the habit of walking, by walking
  of running, by running. -- Epictetus (c. 60 AD) -- How the Semblances of Things are to be combated, -- Discourses, Book ii, Chap....
• Every art and every faculty contemplates certain things as its principal objects.
  -- Epictetus (c. 60 AD) -- Discourses, Book i, Chap. xx...
• The appearance of things to the mind is the standard of every action to man.
  -- Epictetus (c. 60 AD) -- That we ought not to be angry with Mankind, -- Discourses, Book i, Chap....
• Be not hurried away by excitement, but say, "Semblance, wait for me a little.
  Let me see what you are and what you represent. Let me try you....
• Reason is not measured by size or height, but by principle.
  -- Epictetus (c. 60 AD) -- Discourses, Book i, Chap. xii...
• The essence of good and evil is a certain disposition of the will.
  -- Epictetus (c. 60 AD) -- Of Courage, -- Discourses, Book i, Chap. xxix...