In Silence

A person must learn how and train oneself to daven in a low voice, including the Pesukei D'Zimra, but be able to cry out in silence with all one's strength, and similarly in Torah study, as the verse says, "All my bones will say..." Indeed, when one cries out from a state of deveykus, it will be in silence.

(Baal Shem Tov)