People don’t realize this because they redefine the Bible to satisfy themselves:
Isa 40:6-8
"All men are like grass,
and all their glory is like the flowers of the field.
7 The grass withers and the flowers fall,
because the breath of the LORD blows on them.
Surely the people are grass.
8 The grass withers and the flowers fall,
but the word of our God stands forever."
NIV