Imagine if you could not communicate by voice and you had to write everything down....
My point exactly. The human voice and the depth and beauty of language is beyond cool--but it is something most of us take for granted. We rarely stop to appreciate the majesty and miracle of our own voice or the blessed gift of hearing, but we should--and we should learn to "play" our voice as well as possible, such that your voice becomes "music to the ears." Nobody picks up an instrument and masters that instrument without putting in long hours of practice. Your voice is an instrument, and You have been practicing your voice for years--almost twelve or thirteen years for most of you, so you should be pretty good at it by now.
But most of us are not that good, mostly because we have not practiced the right techniques or even thought about speaking "better," except perhaps for a class presentation, at a religious ceremony, or when meeting some important person. Speaking well needs to be an active and conscious appreciation for the nuances of language and an empathetic understanding of your audience's situation: You need to appreciate that every syllable of every word is like the limb of a body and to mangle or omit a syllable is the moral equivalent of cutting off a limb. Ouch! t is a rare speaker that speaks too slow. If it seems too slow, it is probably just right. Like an old dell laptop, people need time to process what they hear. Give them that time. You need to project your voice to the bleacher seats of your audience. The people in the bleachers will certainly appreciate it, and the rich folks in the box seats will relish being so close to such an amazing and powerful speaker. The human voice is carried in waves that are carried on to the shores of your listener's ears.
Live in the present reality of your thoughts, your voice, and your situation. When others truly hear you, the world is a better place.