Discussion is an exchange of intelligence. Argument is an exchange of ignorance.
Diseases are the interests of pleasures.
Dispatch is the soul of business.
Distrust all in whom the impulse to punish is powerful.
Do business, but be not a slave to it.
Do not all you can; spend not all you have; believe not all you hear; and tell not all you know.
Do not buy what you want, but what you need; what you do not need is dear at a farthing.
Do not do to others what you would not have them do to you.
Do not look each of you to your things, but each of you also to the things of others.
Do not pick the sesame seeds but overlook the watermelons.
Do not put all your eggs in one basket.
Do not put new wine into old bottles.
Do not try to live for ever. you will not succeed.
Do not, for one repulse, forgo the purpose that you resolved to effort.
Do what is right, come what may.
Do you know that those who run in a race run all, but only one receives the prize? Even so run, that you may attain.
岂不知在场上赛跑的都在跑，但得奖赏的只有一人 ? 即使如此，也只有这样跑，你们才有可能得到奖赏．
Don't be afraid of making mistakes, but it is harmful to let them remain uncorrected. 不怕有过，就怕不改．
Don't believe that winning is really everything. It's more important to stand for something. If you don't stand for something, what do you win?
Lane Kirkland 莱恩.柯克兰
Don't count your chickens before they are hatched.
Don't deck yourself up with fine clothes, but enrich your mind with profound knowledge.
Don't expect anything original form an echo.
Don't halloo till you are out of the wood.
Don't have too many irons in the fire.
Don't have your cloak to make when it begins to rain.
Don't meet trouble half-way.