It means that our human condition is frail and temporary, indicating that without God's grace, we are spiritually lifeless (1 Peter 1:24).
The metaphor that all flesh is as grass, found in 1 Peter 1:24, highlights the transitory nature of human life and achievement. Just as grass withers and fades, so too does human glory and strength come to nothing apart from God's grace. This imagery serves to remind us of our inadequacy and the need for divine grace. The good news is that despite our frailty, God offers life and hope through the gospel, which is eternal and unchanging. Understanding this metaphor prompts believers to rely not on their own strength but solely on God's unchanging Word for sustenance and strength.
Scripture References:
1 Peter 1:24-25, Isaiah 40:6-8, 1 Peter 1:24
Commentary