Sit in meditation ! But do not think ! Look only at your mind ! You will see thoughts coming into it ! Before they can enter, throw these away from your mind till your mind is capable of entire silence.
To be silent is not to lose your tongue. On the contrary, it is only through silence that one can discover something new to talk about. One who talked incessantly, without stopping to look and listen, would repeat himself ad nauseam.
There is nothing mind can do that cannot be better done in the mind's immobility and thought-free stillness. When mind is still, then truth gets her chance to be heard in the purity of the silence.