the word of our God endures forever

" A voice says, "Cry out."
And I said, "Why shall I cry?
All people are like grass,
and all their faithfulness is like the flowers of the field.
The grass withers and the flowers fall,
because the breath of the LORD falls on them.
Surely the people are the grass.
The grass withers and the flowers fall,
but the word of our God endures forever.
 Isaiah 40: 6-8