”The purpose of Tathata is to nourish the world.” What does this mean?

In silence, you are not you (because “You” is also a thought), you are the silence.
What we don’t understand is the profound implications of this.
You are in silence, and a thought arises in your mind from that silence, from that nothingness, and disappears back into the same nothingness in due time.
But what thoughts arise is up to us.
Some thoughts become like a twister and take you for a wild ride, and some build up a monument of peace, tranquility, and wisdom in your life and for the people around you.
It’s your choice; that is the POWER OF NOW.