Continuing the previous thought...
The HIGHEST level of spirituality one can achieve in this world is prophecy - nevuah. A navi is as close to Hashem as one can possibly get in this world.
Let us examine the word "navi". Where does it come from? The psauk says "niv sfasaim" - the fruits of one's lips. A Navi then is a SPEAKER of Divine messages. So we see that the highest plateau in this world is in the realm of SPEECH. This is well understood based on what we explained that the greatest expression of our Divine humanity is our power of speech.