For silence you pay double. Megila 18a.

I've started learning with a new Chevruta, and here is something from our study together.  It is also surprising.  The context is a discussion of the reason for the order of the 19 blessings of the Amida.  The Gemara states that they were set by the Men of the Great Assembly, but forgotten and restored by Rabbi Shimon HaPakoli.  The Gemara states that after that moment of restoration:

It is forbidden to tell G-d's praise.   {Rashi states this means that it is forbidden to create a new blessing, presumably to add onto the Amida.  Without this explanation that statement is shocking!}  As Rebbe Elazar stated, Why is it written: (Psalms 106:2) 'Who can tell the might of G-d, and announce all of His praise?'  For whom is it pleasant to recount G-d's might?  Only the one who can tell of ALL of his praise.  {i.e. not do a partial job - which is the only true possibility given that G-d is infinite.}  Raba  bar bar Hanna taught in the name of Rebbe Yochanan,  One who speaks of G-d's praise too much is uprooted from the world, as it is written, (Job 37:20)  Is anything conveyed to  Him when I speak?  If a person speaks he will be destroyed.'  {the plain meaning according to JPS is 'Is anything conveyed to Him when I speak?  Can a man say anything when he is confused?'  The Hebrew is ambiguous which makes for juicy drashot!}  Rebbe Yehuda of Kfar Giburia, and some say it was Rebbe Yehuda of Kfar Gibur Chayil, said why is it written, (Psalms 65:2) 'For you, silence is praise.'  {Again that is a midrashic translation, the plain meaning is 'Praise befits you.' Thanks JPS!}   The universal medicine is silence.  As Rav Dimi said, They say in Eretz Israel, a word is worth one sela [a coin], silence is worth two coins.  

Why is silence so much more valuable than creativity in this context?