"Silence is gold" hides a truth that most of us experienced: sometimes is better to keep your mouth shut. Silence can create a lot of impressions, and might help us go through difficult times in our relationships with others.
In silence you can concentrate and get more creative.
Silence is beneficial for your mind.
Silence makes you a better listenet - when you're talking to someone, you must just listen for a moment, without trying to compose in your mind the answers while the other one is talking.
Silence can be terapeutical - when you manage to obtain the calm and peace, you think more clearly.
The word is silver, the silence  is gold.