Prepare Yourself for the Measure of Silence
The entire realm of consciousness, with everything that comes from it, down to the very lowest levels (in other words, the entirety of existence) shifts between times of silence and times of speech. When the universe prepares itself to receive God's supernal outpouring, everything is still and silent. Then, when those forces that have received God's outpouring sent onward to those below them, speech begins.
Our human reality also shifts in this manner. When we direct our minds to improving qualities that lie below our inner, spiritual level, then our consciousness is constricted, and we are active in the world. But when our supernal attention grows strong, this constricted consciousness can no longer act. At that time, silence begins to rule.
When you reach this level, the normal activity of consciousness (whether it is dealing with everyday or holy matters) is below you. You find within yourself a great, unceasing opposition to any activity of consciousness that is rational and structured. Prepare yourself for the measure of silence. Take heed of the voice from above that brings blessing and good will and spontaneously gives these to you. God's word will come to you. Day to day expresses speech.
Orot Hakodesh I, p. 116