I know that praying "from the heart" is good.
But I also know that praying another person's good words is also good; very good ...
especially when we don't have words.
I love this prayer:
our sins are too heavy to carry,
too real to hide,
and too deep to undo.
Forgive what our lips tremble to name,
what our hearts can no longer bear,
and what has become for us a consuming fire of judgment,
Set us free from a past we cannot change;
open to us a future in which we can be changed;
and grant us grace to grow more and more
in your likeness and image,
through Jesus Christ,
the light of the world.