If a word spoken in its time is worth one piece of money, silence in its time is worth two. (Traditional Proverb)
From the persistence of noise comes the insistence of rage. From the emergence of tone comes the divergence of thought. From the enlightenment of music comes the wisdom of ... silence. (Traditional Proverb)
Exuberance is a good stimulus towards action, but the inner light grows in silence and concentration. (Traditional Proverb)