Dale Carnegie

"My popularity, my happiness and sense of worth depend to no small extent upon my skill in dealing with people."

If the thought beneath your words is warm, fresh, spontaneous, a part of your self, your utterance will have breath and life. Words are only a result. Do not try to get the result without stimulating the cause.

You must concentrate by resolutely withdrawing your attention from everything else. If you concentrate your thought on a pain which may be afflicting you, that pain will grow more intense. "Count your blessings" and they will multiply.

the man who cannot concentrate is either weak of will, a nervous wreck, or has never learned what will–power is good for.

Cultivate your will by willing and then doing, at all costs. Concentrate—and you will win.

To concentrate is simply to attend to one thing, and attend to nothing else. If you find that you cannot do that, there is something wrong—attend to that first.

concentrating solely on the thought that you are expressing

Half the troubles of mankind arise from anticipating trials that never occur. Avoid this in speaking. Make the end of your sentences just as strong as the beginning. CONCENTRATE.
WAR!

the true source of power in man lies within himself. This may seem like "mere psychology," but it has an intensely practical bearing on public speaking, as will appear.

suit the action to the word, the word to the action;