Speech: A matter of life and death

Hi,

"Since Tanach already says, “Their tongue is a drawn arrow,” why does it also need to say, “Death and life are in the hands of the tongue?”

"It is as Rava taught: One who desires life will find it with his tongue, and one who desires death will find it with his tongue."

(Talmud, Erchin 15b)

Have a great day,
Mordechai