However much you may study, plan, or premeditate, there must be no indication of conscious or studied attempt in the act of speaking to an audience. At that time everything must be merged into your personality.
Your earnestness in speaking arises principally from having a distinct conception of the object aimed at and a strong desire to accomplish it. Under these circumstances you summon to your aid all your available power of thought and feeling. Your mental faculties are stimulated into their fullest activity, and you bend every effort toward the purpose before you.
But however zealous you may feel about the truth or righteousness of the cause you espouse, you will do well always to keep within the bounds of moderation. You can be vigorous without violence, and enthusiastic without extravagance.
You must not only thoroughly know yourself and your subject, but also your audience. You should carefully consider the best way to bring them and yourself into unity. You may do this by making an appeal to some principle commonly recognized and approved by men, such as patriotism, justice, humanity, courage, duty, or righteousness.
What Phillips Brooks said about the preacher, applies with equal truth to other forms of public speaking:
"Whatever is in the sermon must be in the preacher first; clearness, logicalness, vivacity, earnestness, sweetness, and light, must be personal qualities in him before they are qualities of thought and language in what he utters to his people."
After you have earnestly studied the principles of public speaking you should plan to have regular and frequent practise in addressing actual audiences. There are associations and societies everywhere, constantly in quest of good speakers. There will be ample opportunities for you if you have properly developed your speaking abilities.
And now to sum up some of the most essential things for you:
1. READ ALOUD EVERY DAY
This is indispensable to your greatest progress in speech culture. Reading aloud, properly done, compels you to pronounce the words, instead of skimming over them as in silent reading. It gives you the additional benefit of receiving a vocal impression of the rhythm and structure of the composition.