The Zohar (הקדמה) below is based on a GEMARA MEGILA - gives us the value of Silence:
One word is worth $1 - Silence is worth $2
Rabbi Elazar in the Zohar below reveals that SILENCE actually builds 2 worlds - an upper one and a lower one.
This is important because SUSTAINABILITY is achieved only if you build both. For example: Did the Roman truly destroyed the second temple? The Answer is NO - because they were never able to destroy the upper temple which is our faith. That is why we survived for 2000 years without a temple.
God promised that he will not enter the upper temple until we build for him the lower temple. Which the Palestinians are preventing us from doing.
To win an argument - keep silent
To build anything - build one up and one down