All we have to do is believe. Faith will grow. Increased faith pushes us to do something about it. Then the surge of peace that comes with authentic works increases faith and works and peace.

James 2:14-17
What good is it, my brothers, if someone says he has faith but does not have works? Can that faith save him?
If a brother or sister is poorly clothed and lacking in daily food,
and one of you says to them, “Go in peace, be warmed and filled,” without giving them the things needed for the body, what good is that?
So also faith by itself, if it does not have works, is dead.
Bible Gateway passage: James 2:14-17