How do we know God's glory is eternal?

Psalm 104:31 affirms that the glory of the Lord will endure forever, differentiating it from the transient glory of man, which fades like grass. The speaker elaborates that God's works, including creation and redemption, reflect His everlasting glory. This contrasts sharply with human achievements, which are fleeting and ultimately fruitless in the context of eternity. The assurance that God's glory is eternal is rooted in His sovereign nature, signifying that all He creates and does will ultimately bring Him glory and power that never diminishes.