You have a brain and mind of your own. Use it, and reach your own decisions. If you need facts or information from other people, to enable you to reach decisions, as you probably will in many instances; acquire these facts or secure the information you need quietly, without disclosing your purpose.
It is characteristic of people who have but a smattering or a veneer of knowledge to try to give the impression that they have much knowledge. Such people generally do too much talking, and too little listening. Keep your eyes and ears wide open–and your mouth closed, if you wish to acquire the habit of prompt decision. Those who talk too much do little else. If you talk more than you listen, you not only deprive yourself of many opportunities to accumulate useful knowledge, but you also disclose your plans and purposes to people who will take great delight in defeating you, because they envy you.
Remember, also, that every time you open your mouth in the presence of a person who has an abundance of knowledge, you display to that person, your exact stock of knowledge, or your lack of it! Genuine wisdom is usually conspicuous through modesty and silence.
Keep in mind the fact that every person with whom you associate is, like yourself, seeking the opportunity to a accumulate money. If you talk about your plans too freely, you may be surprised when you learn that some other person has beaten you to your goal by putting into action ahead of you, the plans of which you talked unwisely.
Let one of your first decisions be to keep a closed mouth and open ears and eyes.
As a reminder to yourself to follow this advice, it will be helpful if you copy the following epigram in large letters and place it where you will see it daily.
“Tell the world what you intend to do, but first show it.”
This is the equivalent of saying that “deeds, and not words, are what count most.”
* Source: Think and Grow Rich by Napoleon Hill