Sirach 37:17

17 The key to change is the heart;

Sirach 37:17 In-Context

15 But above everything else, pray to the Most High, so that he may make your path straight in truth.

16 Speech is the beginning of every deed, and planning comes before every action.

17 The key to change is the heart;

18 it poses four possibilities: good and evil, life and death, and their continual master is the tongue.

19 Some people instruct many, but they are useless to themselves.