Seek the Lord while he may be found,
call him while he is near....
For just as from the heavens
the rain and snow come down
And do not return there
till they have watered the earth,
making it fertile and fruitful,
Giving seed to him who sows
and bread to him who eats,
So shall my word be
that goes forth from my mouth;
It shall not return to me void,
but shall do my will,
achieving the end for which I sent it.
(New American Bible, Isaiah 55: 6, 10-11)