I beg you, if you want to give your species something of lasting value, then do not seek to become a skillful speaker. The best way to teach is to be an example. Show others the correct priorities by the way you live your life. Such a teaching, without words, is a thousand times more powerful than anything eloquence can produce.
Now imagine the awesome power of the teachings of one who, living a truthful life, develops all the verbal skills as well!
Even so, no matter the spiritual man's wisdom or teaching skills, he will always be hated. When relaxed and eloquent he will be hated for what he says; when nervous with God-induced insecurity, he will be hated both for what he says, and for the uneasy way he says it.
All this the spiritual man takes in his stride, which spans entire universes.