"Every good servant does not all commands."
William Shakespeare
Late 16th/early 17th century British poet/playwright
If you are just beginning your business career you are likely saying, "Hah! I knew that."
If you are farther along, with employees reporting to you, you might be saying, "True, but do all my commands."
And if you are at or near the end of your career your reaction might be, "Yes, but the hard part is knowing which ones when."