Moreover...

Moreover, silence causes a condition of "reflection" and "spirituality" and "clear-sightedness", which is noteworthy, and perhaps for this reason we read in the biography of Zachariah, God's great prophet, that three days of his silence and dumbness were put as the sign of fulfilment of his supplication concerning his request for a child: قَالَ آيَتُكَ أَلَّا تُكَلِّمَ النَّاسَ ثَلَاثَ لَيَالٍ سَوِيًّا He said: Thy token is that thou, with no bodily defect, shalt not speak unto mankind three nights.

We can summarize advantages of silence in following affairs: 1- Silence insures man against a lot of sins. Prophet (S) says in his short and meaningful phrase: «مَنْ صَمَتَ نَجا». Whosoever mums is saved.[^3] The reason for this issue is clear, because most of the sins are performed by tongue. As Prophet (S) says: «اِنَّ اَکْثَرَ خَطایَا ابْنِ آدَمَ فِی لِسانِهِ».

As intelligence increases, speech decreases.[^7] In addition to the fact that silence is the best means for reviving reflection power, the above phrase may refer to this point that plenty of mental powers are used for speaking. When these energies are saved, they will form massive power through which understanding of great realities will be possible.