The song repeatedly asks the rhetorical question: “Have you seen the Lord fail?” or “Have you seen the Lord lose?”
It affirms that God never fails. One key line is “The word of God never fails / The word of God never falls / The word of God is the truth / It always comes to pass.”
Also, there’s emphasis that God’s promises are trustworthy; His word does not return void.
The song also says “Your word is yea and amen”, pointing to the certainty and unfailing nature of God’s word.